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    MC LC

    MC LC .............................................................................................................I

    DANH MC BNG ..........................................................................................IVDANH MC HNH ............................................................................................ V

    M U ...............................................................................................................1

    CHNG 1 ..........................................................................................................3

    KHI QUT CHUNG V D N ....................................................................3Thng tin chung ...................................................................................................... 3

    1.2. C s l p d n c i t o, ph c h i mi tr ng ............................................... 3

    1.2.1. C s php l ................................................................................................ 31.2.2. Ti li u c s ................................................................................................. 4

    1.2.3.T ch c th c hi n l p D n c i t o, ph c h i mi tr ng .............................. 5

    1.3. V tr c a d n ................................................................................................. 5

    1.3.1. V tr a l c a D n .................................................................................... 5

    1.3.2. i u ki n t nhin ......................................................................................... 7

    1.3.2.1. i u ki n a hnh ...................................................................................... 7

    1.3.2.2. i u ki n kh t ng .................................................................................... 7

    1.3.2.3. i u ki n th y v n ................................................................................... 10

    1.3.2.4. Hi n tr ng ch t l ng cc thnh ph n mi tr ng v t l ..........................10

    1.3.3. c i m kinh t x h i ............................................................................... 10

    1.3.3.1. c i m kinh t ...................................................................................... 10

    1.3.3.2. c i m x h i ....................................................................................... 11

    1.4. M c tiu c a d n c i t o, ph c h i mi tr ng ............................................12

    1.4.1. M c tiu chung ............................................................................................ 12

    1.4.2. M c tiu c th ........................................................................................... 12

    CHNG 2 ........................................................................................................14

    C IM CNG TC KHAI THC KHONG SN ..............................142.1. Khi qut chung v khu v c khai thc khong s n ......................................... 14

    2.1.1. i u ki n a ch t khu v c ........................................................................... 14

    2.1.1.1. a ch t khu v c ...................................................................................... 14

    2.1.1.2. a ch t khu m ....................................................................................... 15

    2.1.1.3. a ch t th y v n ..................................................................................... 16

    2.1.1.4. a ch t cng trnh ................................................................................... 172.1.2. Khi qut v khu m ................................................................................... 18

    2.1.2.1. Ti n ..................................................................................................... 18

    I

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    2.1.2.2. Cng su t ................................................................................................. 19

    2.1.2.3. Tr l ng .................................................................................................. 19

    2.1.2.4. Tu i th m .............................................................................................. 19

    2.1.2.5. Ch lm vi c ........................................................................................ 20

    2.1.3. Hi n tr ng khu v c d n ............................................................................ 20

    2.2. Ph ng php khai thc ................................................................................... 20

    2.2.1. Ph ng phap khai thc ................................................................................ 20

    2.2.2. Trnh t khai thc v h th ng khai thc ..................................................... 20

    2.2.2.1. Trnh t khai thc ..................................................................................... 20

    2.2.2.2. H th ng khai thc ................................................................................... 20

    2.2.3. Quy trnh cng ngh khai thc v ch bi n ............................................. 21

    2.2.4. Danh m c my mc thi t b ........................................................................ 27

    2.2.5. Nhu c u nguyn, nhin li u v cc ch ng lo i s n ph m ............................. 27

    2.2.6. H t ng k thu t ......................................................................................... 28

    2.2.7. T ng m t b ng ............................................................................................ 31

    2.3. Hi n tr ng mi tr ng .................................................................................... 31

    2.3.1. Hi n tr ng ch t l ng mi tr ng khng kh xung quanh ............................31

    2.3.2 Ch t l ng n c ng m ................................................................................. 32

    2.3.3. Ch t l ng n c m t ................................................................................... 33

    2.3.4. Hi n tr ng s d ng t v ph ng n n b ..............................................34

    2.4. Tc ng n mi tr ng ............................................................................... 34

    2.4.1 Tc ng n mi tr ng khng kh ............................................................. 34

    2.4.3. Tc ng t i a hnh ................................................................................... 36

    2.4.4. Tc ng n ng th c v t, a d ng sinh h c ...........................................37

    2.4.5. Cc tc ng n ho t ng kinh t - x h i trong vng ..............................37

    CHNG 3PHNG N CI TO, PHC HI MI TRNG ................................38

    Bng 3.2: Khi lng lp t bin bo nguy him .........................................45CHNG 4 ........................................................................................................49

    T CHC QUN L V GIM ST MI TRNG ...............................494.1. T ch c qu n l .............................................................................................. 49

    4.2. Ch ng trnh gim st mi tr ng .................................................................. 53

    4.2.1. Gim st ch t l ng n c m t .................................................................... 53

    4.2.2. Gim st mi tr ng khng kh ................................................................... 53

    4.2.3. Cc n i dung gim st khc ......................................................................... 53

    CHNG 5 ........................................................................................................54D TON CHI PH CI TO, PHC HI MI TRNG .....................54

    II

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    5.1. D ton chi ph c i t o, ph c h i mi tr ng .................................................. 54

    5.1.1 Chi ph c i t o m t b ng sn cng nghi p (CSCN) ........................................ 56

    5.1.2. Chi ph Chi ph tho d cc cng trnh xy d ng (CVP_NX) .......................... 56

    5.1.3. Chi ph c i t o khu v c moong khai thc (CKT) ............................................ 58

    5.1.4. Chi ph tr ng cy ......................................................................................... 60

    Tng h p chi phi phuc hi mi tr ng ................... 63

    5.2. Tnh ton khoan ti n k qu v th i i m k qu ............................................ 64

    5.2.1 Xac inh hinh th c ky quy ............................................................................ 64

    5.2.2 Xac inh m c tin ky quy ............................................................................. 64

    5.2.2.1 S tin ky quy ln u ............................................................................... 64

    5.2.2.2 S tin ky quy nh ng ln sau .................................................................... 64

    5.3.Th i i m th c hi n k qu ............................................................................. 64

    CHNG 6 ........................................................................................................65

    CAM KT THC HIN V KT LUN .....................................................656.1. Cam k t c a Cng ty ...................................................................................... 65

    6.2. K t lu n .......................................................................................................... 65

    III

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    DANH MC BNG

    Bng 1.1: Ta cc im mc khu vc khai thc..........................................6

    Bng 1.2: Nhit khng kh khu vc d n...................................................7Bng 1.3: S gi nng khu vc d n................................................................8

    Bng 1.4: Lng mua khu vc d n................................................................9

    Bng 1.5: m khu vc d n.........................................................................9

    Hnh 2.1: Quy trnh cng ngh khai thc ...................................................21

    Hnh 2.2: S khi quy trnh tin hnh cng tc khoan n mn................24

    Bng 2.1: Khi lng vt liu n cng nghip cn s dng...........................24

    Hnh 2.3: Quy trnh cng ngh ch bin .....................................................26Bng 2.2: Thng k cc my mc thit b ch yu ca m............................27

    Bng 2.3: Vt t, nguyn liu cn thit phc v m.................................28

    Bng 2.4: V tr ly mu khng kh..................................................................31

    Bng 2.5: Kt qu phn tch mu khng kh xung quanh.............................32

    Bng 2.6: V tr ly mu nc ngm................................................................32

    Bng 2.7: Kt qu phn tch ha l..................................................................32

    Bng 2.8. Kt qu phn tch vi sinh.................................................................33

    Bng 2.9: V tr ly mu nc mt...................................................................33

    Bng 2.10: Kt qu phn tch mu nc mt ti khu vc D n.................33

    Bng 3.1: Khi lng ci to mt bng sn cng nghip...............................42

    Bng 3.2: Tng hp cc cng tc ci to, phc hi mi trng....................45

    Bng 3.3: Nhu cu my mc, thit b, nguyn vt liu s dng....................47

    Bng 4.1: Chng trnh qun l ci to, phc hi mi trng ti D n....51Bng 5.1: Ch s gi vt liu, nhn cng, my thi cng Qu I nm 2011.....54

    Bng 5.2: Chi ph ci to mt bng sn cng nghip.....................................56

    Bng 5.3: Chi ph ci to khu vc vn phng nh xng nh kho.........57

    Bng 5.5: Chi ph lp t bin bo nguy him................................................58

    Bng 5.6: Chi ph san lp moong khai thc.....................................................59

    Bng 5.7: Chi ph san lao ng cho trng cy.................................................60

    IV

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    DANH MC HNH

    Hnh 2.1: Quy trnh cng ngh khai thc ..... Error: Reference source not found

    Hnh 2.2: S khi quy trnh tin hnh cng tc khoan n mnError: Referencesource not found

    Hnh 2.3: Quy trnh cng ngh ch bin ...... Error: Reference source not found

    V

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    M U

    Trong thi im hin nay v nhng nm ti, trn a bn huyn c

    Trng cng nh ton tnh Lm ng, Nh nc ang u t xy dng v nngcp cc tuyn quc l, tnh l, giao thng ni th, giao thng nng thn v xydng cc khu du lch.

    Nn kinh t cng pht trin, th nhu cu xy dng, ci to c s h tngngy cng ln, ko theo nhu cu v vt liu xy dng tng ln. Vic tin hnhthm d, khai thc Khai thc v ch bin khong sn M xy dng Ryolit tithn Gn Reo, x Lin Hip, huyn c Trng, tnh Lm ng nhm cung cpngun vt liu xy dng trn c s s dng hp l ti nguyn sn c cho cccng trnh xy dng trong khu vc; p ng nhu cu pht trin kinh t x hi

    ca a phng; ng thi nng cao hiu qu sn xut kinh doanh ca n v,gp phn ng gp cho ngn sch Nh nc l vn rt cn thit.

    c s hng dn ca cc c quan ban ngnh, Cng ty C phn a c Lt lp cc th tc php l xin thm d khai thc xy dng trn dintch 5,0ha ti Khai thc v ch bin khong sn M xy dng Ryolit, x LinHip, huyn c Trng, tnh Lm ng. Cng ty c cp giy php thm ds 22/GP UBND ngy 11/3/2011,Quyt nh s 1184/Q UBND ngy25/5/2011V/v iu chnh giy php thm d khong sn s 22/GP UBND caUBND tnh Lm ng. V Quyt nh ph duyt tr lng s 1673/Q-UBND

    ngy 04/08/2011 ca UBND tnh Lm ng.Tun th Lut Bo v mi trng c Quc hi Nc cng ha x hi

    ch ngha Vit Nam thng qua ngy 29/11/2005, Lut Khong sn v cc vnbn php lut lin quan i vi vic bo v mi trng trong v sau khi kt thckhai thc nh thng t 34/2009/TT-BTNMT ngy 31/12/2009 V/v Quy nh lp,

    ph duyt, kim tra, xc nhn D n ci to, phc hi mi trng v k qu cito, phc hi mi trng i vi hot ng khai thc khong sn v Quyt nh71/2008/Q-TTg ngy 29/5/2009 V/v K qu ci to, phc hi mi trng ivi hot ng khai thc khong sn. Cng ty C phn a c Lt phi hp

    vi Cng ty TNHH Nam i Vit lp D n ci to, phc hi mi trng Khaithc v ch bin khong sn M xy dng Ryolit. D n c thnh lpnhm cc mc ch:

    - Ci to, phc hi mi trng a mt phn mi trng v h sinh thiv tnh trng ban u.

    - xut cc phng n ci to, phc hi mi trng.

    - xut cc chng trnh gim st mi trng ph hp nhm m bocc thng s v mi trng chnh yu c theo di thng xuyn trong qu

    trnh ci to, phc hi mi trng.

    1

    http://giaiphapmoitruong.com/van-ban-2/luat/luat-bao-ve-moi-truonghttp://giaiphapmoitruong.com/van-ban-2/luat/luat-bao-ve-moi-truong
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    - Cung cp cn c c s khoa hc cho c quan chc nng thun li trongvic qun l v gim st cc ni dung ci to mi trng.

    2

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    CHNG 1

    KHI QUT CHUNG V D N

    Thng tin chung- Tn d n:

    KHAI THC V CH BIN KHONG SN M XY DNGKHAI THC V CH BIN KHONG SN M XY DNGRYOLITRYOLIT

    - Tn ch u t: Cng ty C phn a c Lt

    - a ch lin lc: S 21, Trn Ph, phng 3, thnh ph Lt, tnh Lm ng

    - in thoi: 063.822.885 Fax: 063.821.433

    - Email: [email protected] Website: dalatreal.com.vn- i din: Ng Phc Chc v: Tng Gim c

    - Giy chng nhn ng k kinh doanh: s 5800000142, ng k ln ungy 27/12/2007; ng k thay i ln th 1 ngy 23/6/2009.

    - Hnh thc u t: Cng ty C phn a c Lt la chn hnh thc ut mi (v tn dng li cc cng trnh xy dng c)

    - Hnh thc qun l D n: Cng ty C phn a c Lt s trc tipqun l d n.

    1.2. C s lp d n ci to, phc hi mi trng

    1.2.1. C s php l

    - Lut Bo v Mi trng c Quc hi nc Cng ha x hi ch nghaVit Nam thng qua ngy 29 thng 11 nm 2005.

    - Lut Khong sn c Quc hi Nc cng ha x hi ch ngha Vit Namthng qua ngy 17 thng 11 nm 2010, c hiu lc thi hnh t ngy 01 thng 7 nm2011.

    - Ngh nh s 80/2006/N-CP ngy 09 thng 8 nm 2006 ca Chnh ph vvic quy nh chi tit v hng dn thi hnh mt s iu ca Lut Bo v Mitrng.

    - Ngh nh s 21/2008/N-CP ngy 28 thng 01 nm 2008 ca Chnh ph vvic sa i, b sung mt s iu ca Ngh nh s 80/2006/N-CP ngy 09 thng8 nm 2006 ca Chnh ph v vic quy nh chi tit v hng dn thi hnh mt siu ca Lut Bo v mi trng.

    - Ngh nh s 07/2009/N-CP ngy 22 thng 01 nm 2009 ca Chnh ph v

    vic sa i, b sung mt s iu ca Ngh nh s 160/2005/N-CP ngy27/12/2005 ca Chnh ph quy nh chi tit v hng dn thi hnh Lut Khongsn v Lut sa i, b sung mt s iu ca Lut Khong sn.

    3

    mailto:[email protected]:[email protected]
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    - Ngh nh s 29/2011/N-CP ngy 18 thng 4 nm 2011 ca Chnh phquy nh v nh gi mi trng chin lc, nh gi tc ng mi trng, camkt bo v mi trng.

    - Thng t s 34/2009/TT-BTNMT ngy 31 thng 12 nm 2009 quy nh v

    lp, ph duyt, kim tra, xc nhn D n ci to, phc hi mi trng v k qu cito, phc hi mi trng i vi hot ng khai thc khong sn.

    - Thng t 04/2010/TT-BXD, ngy 26 thng 05 nm 2010 v vic hng dnlp v qun l chi ph u t xy dng cng trnh.

    - Quyt nh s 219/199/Q-TTg ngy 11 thng 11 nm 1999 ca Chnh phv chnh sch bo h quyn li ca nhn dn a phng ni c khong sn ckhai thc, ch bin v bo v ti nguyn khong sn cha khai thc.

    - Quyt nh s 68 /2006/Q-UBND ngy 10/11/2006 ca UBND tnh

    Lm ng v vic ph duyt nh mc d ton cng trnh lm sinh ca mt sloi cy trng rng trn a bn tnh Lm ng.

    - Quyt nh 69/2006/Q-UBND V/v Ban hnh b n gi d ton cngtrnh lm sinh tnh Lm ng.

    - Quyt nh 71/2008/Q-TTg ngy 29 thng 05 nm 2008 v vic k qu cito, phc hi mi trng i vi hot ng khai thc khong sn.

    - Quyt nh s 957/Q-BXD ngy 29/09/2009 ca B Xy dng v viccng b nh mc chi ph qun l D n v t vn u t xy dng cng trnh.

    - Quyt nh 43/2006/Q-UBND ngy 06/7/2006 ca UBND tnh Lm ngv vic cng b n gi xy dng cng trnh trn a bn tnh Lm ng.

    - Quyt nh 48/2010/Q-UBND ngy 16/12/2010 ca UBND tnh Lmng v vic quy nh gi cc loi t nm 2011 trn a bn huyn c Trng,tnh Lm ng.

    - Quyt nh s 552/Q-BXD ngy 13/5/2011 ca B Xy dng v vic cngb ch s gi xy dng thng 1, 2, 3 v Qu 1 nm 2011.

    1.2.2. Ti liu c s

    - Giy php thm d khong sn s 22/GP-UBND ngy 11 thng 3 nm 2011ca UBND tnh Lm ng v vic cho php Cng ty C Phn a c Lt thmd xy dng ti thn Gn Reo, x Lin Hip, huyn c Trng, tnh Lm ng.

    - Quyt nh s 1673/Q-UBND ngy 04 thng 8 nm 2011 ca UBND tnhLm ng v vic ph duyt tr lng Khai thc v ch bin khong sn M xy dng Ryolit ti thn Gn Reo, x Lin Hip, huyn c Trng, tnh Lmng.

    - Bo co thm d Khai thc v ch bin khong sn M xy dng

    Ryolit ti thn Gn Reo, x Lin Hip, huyn c Trng, tnh Lm ng.

    4

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    - Thit k c s Khai thc v ch bin khong sn M xy dngRyolit ti thn Gn Reo, x Lin Hip, huyn c Trng, tnh Lm ng.

    - D n u t Khai thc v ch bin khong sn M xy dng Ryolitti thn Gn Reo, x Lin Hip, huyn c Trng, tnh Lm ng.

    - Bo co nh gi tc ng mi trng d n Khai thc v ch binkhong sn M xy dng Ryolit ti thn Gn Reo, x Lin Hip, huyn cTrng, tnh Lm ng vi cng sut 70.000 m3 nguyn khi /nm.

    - Ti liu thc t v iu tra, kho st hin trng khu vc d n.

    1.2.3.T chc thc hin lp D n ci to, phc hi mi trng

    n v t vn: Cng ty TNHH Nam i Vit.

    Ngi i din: B Hong Th Thu H Chc v: Gim c

    a ch: 15D4, ng Nguyn i Quc, Phng Trung Dng, Thnh phBin Ha, Tnh ng Nai.

    in thoi: 0618.820.598 Fax: 0618.820.599

    Tham gia trc tip lp Bo co nh gi tc ng mi trng gm Ch dn v cc cn b k thut ca Cng ty TNHH Nam i Vit c tn sau y:

    TT Thanh vinTrnh chuyn

    mnC quan cng tc

    1 Ng Phc Tng gim c Ch d n

    2 Th Kim Chi Th.S Mi trng(ch bin)

    Cng ty TNHH Nam i Vit

    3 Nguyn Tun KhanhK s tuyn

    khongCng ty TNHH Nam i Vit

    4 V Th Tuyt K s mi trng Cng ty TNHH Nam i Vit5 Nguyn Don Hin K s mi trng Cng ty TNHH Nam i Vit6 Nguyn Vn Bu K s mi trng Cng ty TNHH Nam i Vit

    7Nguyn Th Thc

    QuynK s mi trng Cng ty TNHH Nam i Vit

    8 Trn Th T Nht K s mi trng Cng ty TNHH Nam i Vit1.3. V tr ca d n

    1.3.1. V tr a l ca D n

    D n Khai thc v ch bin khong sn M xy dng Ryolit ti thnGn Reo, x Lin Hip, huyn c Trng, tnh Lm ng nm trn cao nguynkhu vc c Trng, cch trung tm th x c Trng khong 20 km v phaBc.

    Din tch khu vc thm d 5 ha, c gii hn bi cc im khp gc: 1, 2,3, 4, 5, 6, 7 v 8; h ta VN-2000 KT 107045 mi 3 c ta nh sau:

    5

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    Bng 1.1: Ta cc im mc khu vc khai thc

    Ngun: Giy php thm d khong sn s 1184/Q UBND ngy

    25/05/2011Pha Ty khu m c a hnh bnh nguyn, cn pha ng-ng Bc ca

    m l i ni cao ng thi cng c nhiu khe sui nh. cao khu m thay it 1.0411.086m. Cc dy ni ko di phng kinh tuyn, nghing thoi v

    pha TN. B mt a hnh thuc dng xm thc bc mn. a hnh khu vc thmd l sn pha Ty-Ty Nam ca nh ni cao 1.134,8m sn thoi.

    Mi tng quan ca v tr d n vi cc i tng xung quanh

    Dn c

    Xung quanh khu vc m, dn c cn tha tht, sng ch yu dc theo cctrc ng v gn cc trung tm hnh chnh cc x, th trn. Ngh nghip chnhca dn c gn khu m l nng nghip, trng hoa mu v cy cng nghip nhch, c ph, tiu, mt s h bun bn nh. Tng s h dn xung quanh khu vcd n cch bn knh 200m c 7 h dn.

    H thng giao thng

    ng b rt thun li, t khu m c ng cp phi rng 5-6m dikhong 6km dn ra QL27, t c th lu thng vi thnh ph Lt v vng

    kinh t trng im ng Nai - thnh ph H Ch Minh Vng Tu. V vy snphm ca m c th vn chuyn d dng cung cp cho cc th trng tiu th.

    Sng sui

    V pha Ty v ng Nam khu vc thm d khong 1,2km c cc dngsui ln, chiu di khong 8-10km, lng sui rng 5-6m c nc chy quanhmt vi ch cn to nn thc cao 3-4m. Trong khu vc thm d c cc khe cnch c nc vo ma ma. Chnh cc khe cn ny ng vai tr quan trng chocng tc thot nc ca m trong qu trnh khai thc. Pha trong khu vc d n

    c mt s ao nh cha nc.Cc cng trnh vn ha, tn gio, di tch lch s

    6

    im gcTa VN-2000 KT 107,75 mi 3X(m) Y(m)

    1 13.03.594 5.68.1232 13.03.817 5.68.1763 13.03.779 5.68.3894 13.03.556 5.68.3405 13.03.589 5.68.1526 13.03.604 5.68.1557 13.03.608 5.68.1368 13.03.592 5.68.133

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    Xung quanh d n khng c di tch lch s, cch d n 5km th c nh thAn Ha v cch d n 500m th c mt ngha trang Thin cha gio.

    1.3.2. iu kin t nhin

    1.3.2.1. iu kin a hnh

    Khu vc khai thc M xy dng Ryolit nm ngay sn Ty Nam canh ni c cao 1.134,8m, ton khu vc quanh m c cao b mt a hnht 1.041m n 1.086m hi nghing v ng Nam. Vi c im a hnh nutrn c th chia khu m thnh cc dng a hnh sau:

    - B mt a hnh xm thc bc mn: phn b khu vc pha ng vngnghin cu, pht trin andeit. B mt a hnh c dng i ni thp ko ditheo phng kinh tuyn, nh bng, ng phn thy rng.

    - B mt a hnh bo mn tch t: l a hnh tng i bng phng, cao khong 1.041 1.086m. Vi dng a hnh sn thoi 10-25 0 phn b dcsn ni.

    - a hnh tch t: pht trin dc theo thung lng sui pha Ty v Nam khum, to cc bi bi v thm bc I rng 500-700m; thnh phn l ct, cui si, st.

    1.3.2.2. iu kin kh tng

    (Ngun: Nin gim thng k tnh Lm ng, trm Lin Khng, nm 2009)

    Gn khu vc d n c trm kh tng thy vn Lin Khng vi y

    cc yu t kh tng. S liu cc yu t kh tng thy vn khu vc d n cly ti trm Lin Khng.

    Nhit khng kh

    Nhit khng kh khu vc d n trung bnh trong vng 5 nm t 2005 2009 khong 21,50C, Nhit cao nht trong vng 5 nm t 2005 2009khong 23,4 (thng 5 nm 2005) v thp nht trong vng 5 nm t 2005 2009khong 18,30C (thng 01 nm 2009). Di y l bng nhit trung bnh ccthng trong nm:

    Bng 1.2: Nhit khng kh khu vc d nNm 2005 2006 2007 2008 2009

    Thng 1 19,0 19,8 20,0 20,1 18,3

    Thng 2 21,1 21,2 20,4 19,7 21,5

    Thng 3 21,4 21,9 22,0 21,4 22,2

    Thng 4 22,9 23,1 22,8 22,9 22,8

    Thng 5 23,4 22,8 22,5 22,1 23,2

    Thng 6 23,0 22,7 22,4 21,7 22,6

    Thng 7 21,8 22,0 21,8 22,1 22,2Thng 8 21,9 21,5 21,3 21,5 22,4

    7

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    Thng 9 21,5 21,8 21,8 21,5 21,6

    Thng 10 21,3 21,4 20,8 21,5 21,0

    Thng 11 20,5 21,4 19,8 20,7 21,1

    Thng 12 20,2 20,3 20,0 19,6 20,2C nm 21,5 21,7 21,3 21,2 21,6

    (Ngun: Trm kh tng Lin Khng)

    S gi nng

    Thi k nhiu nng t thng 11 n thng 5 nm sau, S gi nng khu vcd n trung bnh khong 2.267 gi/nm (trong vng 5 nm t 2005 2009), caonht khong 282 gi (thng 2, nm 2007) v thp nht khong 101 gi (thng 9,10 nm 2005). Di y l bng s gi nng trong nm:

    Bng 1.3: S gi nng khu vc d n

    Nm 2005 2006 2007 2008 2009

    Thng 1 190 236 190 224 241

    Thng 2 211 255 282 241 206

    Thng 3 214 273 236 202 269

    Thng 4 229 231 238 242 187Thng 5 234 222 205 166 172

    Thng 6 230 188 182 197 193Thng 7 121 134 171 167 152

    Thng 8 115 126 118 165 177

    Thng 9 101 158 152 101 106

    Thng 10 101 187 116 171 193

    Thng 11 166 246 150 120 196

    Thng 12 97 257 253 179 255

    C nm 2.009 2.513 2.293 2.175 2.347

    (Ngun: Trm kh tng Lin Khng)

    Lng ma

    Khu vc d n chia lm 2 ma r rt:

    - Ma kh: t thng 12 - 4, ma kh nng, gi nhiu, kh nng bc hi lnnn thng khc nghit.

    - Ma ma: t thng 5 - 11, lng ma chim ti hn 85% lng ma nm.

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    Trong vng 5 nm t 2005 2009 lng ma trung bnh khong 1.662mm/nm, cao nht khong 417 mm (thng 9 nm 2007) v c nhng ngy khngma. Di y l bng s lng ma trong nm:

    Bng 1.4: Lng mua khu vc d n

    Nm 2005 2006 2007 2008 2009

    Thng 1 0 15 0 7 0Thng 2 0 6 0 2 83

    Thng 3 52 51 109 29 56

    Thng 4 73 124 51 17 292

    Thng 5 230 154 287 275 325

    Thng 6 131 226 199 152 68

    Thng 7 215 119 166 155 198Thng 8 161 325 310 148 211

    Thng 9 291 369 417 161 357

    Thng 10 328 261 186 115 278

    Thng 11 116 19 105 115 46

    Thng 12 41 10 50 24 0

    C nm 1.638 1.679 1.880 1.200 1.914

    (Ngun: Trm kh tng Lin Khng) m

    m khu vc d n trung bnh khong 79%, cao nht khong 89% (thng9) v thp nht khong 71% (thng 2). Di y l bng m trong nm:

    Bng 1.5: m khu vc d n

    Nm 2005 2006 2007 2008 2009

    Thng 1 75 80 75 77 71

    Thng 2 71 75 74 75 75Thng 3 71 76 75 75 75Thng 4 70 74 75 75 78

    Thng 5 82 78 82 84 84

    Thng 6 82 83 85 81 84

    Thng 7 86 83 85 81 83

    Thng 8 84 88 88 82 85Thng 9 88 87 86 84 89

    Thng 10 87 85 86 82 80

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    Thng 11 82 80 82 81 79

    Thng 12 84 78 75 76 73

    C nm 80 81 81 79 79

    (Ngun: Trm kh tng Lin Khng)

    Tc gi

    Tc gi trung bnh: 2 m/s.

    Cc hng gi ph bin trong vng l gi Ty - Ty Nam thnh hnh tthng ging n thng 10, gi ng - ng Bc t thng 11 n thng 3. Khuvc ny khng c bo, i khi c gi lc v ging.

    1.3.2.3. iu kin thy vn

    Trong khu vc khai thc c cc nhnh sui nh chy an xem gia cc khutrng c ph ca ngi dn. Cc ngun nc ny chnh l ngun ti tiu chnhcho hot ng nng nghip chnh trong khu vc xin khai thc.

    Ngun nc mt ch yu ca huyn c Trng l h thng sng a Nhim,ngoi ra cn c th tn dng ngun nc ca h thng sng a Dng cho khuvc pha Ty Nam ca huyn.

    1.3.2.4. Hin trng cht lng cc thnh phn mi trng vt l

    1.3.3. c im kinh t x hi

    1.3.3.1. c im kinh t

    (Ngun: Bo co tnh hnh kinh t x hi nm 2010, phng hng, nhim v vgii php pht trin kinh t x hi nm 2011 ca y ban nhn dn x Lin Hip)

    V trng trt: Tng sn lng lng thc c t 1.564 tn. Rau cnm din tch gieo trng c 964 ha, la ng Xun gieo trng 21 ha, c phv 2010 din tch thu hoch 1028 ha.

    V chn nui: n gia sc, gia cm trn a bn x tip tc c duy tr

    n nh.V lm nghip: Thng xuyn tuyn truyn, ph bin nhng ch

    trng, chnh sch ca ng, php lut ca nh nc v qun l v bo v rngn tng ngi dn.

    Cng nghip tiu th cng nghip: Trn a bn x c 1 n v hotng trn lnh vc cng nghip l m thuc Cng ty C phn a c Lt,tiu th cng nghip pht trin cha nhiu, hin c khong trn 30 c s snxut, gia cng quy m h gia nh, sn phm ch yu p ng nhu cu tiu dngv phc v sn xut pht trin kinh t ti ch.

    Thng mi dch v: Hot ng kinh doanh thng mi dch vch yu tp trung ti x vi trn 80 quy sp kinh doanh khong gn 15 ngnh

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    hng cng vi mt s doanh nghip v h kinh doanh c th tp trung ch yu mt s thn nh An Hip, An Bnh v Ngha Hip.

    V ti chnh: c thc hin thu ngn sch x: 135% (trong b sungcn i: 803 triu ng, kt d: 168 triu ng). c thc hin chi ngn sch x:

    125%1.3.3.2. c im x hi

    Gio dc o to: Nm hc 2009 2010 tng s hc sinh cc cphc l 1.844 em. Cht lng gio dc t c kh tt, t l hc sinh t loigii tng 15,3%, t l hc sinh yu gim 2,7. S hc sinh gii cc cp u tngso vi nm hc trc, cp trng 513 em, cp huyn 23 em, cp tnh 4 em.

    Ngoi ra phong tro th dc th thao v cc hot ng khc ti cc trng hccng c bc pht trin kh.

    Y t, Dn s - K hoch ha gia nh, bo v chm sc tr em:Trong nm t chc khm bnh cho 6.687 lt ngi, thc hin tt

    chng trnh nha khoa hc ng, khm v qun l sc khe cho 1.680 hc sinhcp 1 v mu gio. Trong nm s bnh nhn lao ang c qun l iu tr l 7, khi bnh l 5, cn 2 bnh nhn ang iu tr cui k.

    i ng l cng tc Dn s - K hoch ha gia nh ca x gm 25 ngi.Cng tc phi hp gia ngnh chuyn mn vi cc ban ngnh, on th nthn c quan tm ch o t c k hoch. T l tng dn s t nhin

    1,48%.Cng tc chm sc v bo v sc khe b m tr em c quan tm ng

    mc, t l suy dinh dng nh cn chim 12,9%, s tr em di 1 tui ctim chng y t 98,9%, tr t 6 36 thng tui ung vitamin A t 98,9%,

    b m sau khi ung vitamin A 99%.

    Cng tc thng binh x hi: R sot h s i tng c hngchnh sch x hi theo quy nh, tng s i tng c hng bo tr x hi l79, hin nay ang hon chnh h s 21 i tng trnh huyn quyt nh.

    Cng tc xa i gim ngho: S h ngho trong nm 2010 ca xLin Hip l 60 h. Cc h c s quan tm thng xuyn v ng mc calnh o a phng, s h tr tch cc ca cc ngnh v ca ton x hi, bngs c gng ln ca bn thn nhng h ngho, to ra bc chuyn bin ngk trong vic gip cc h ngho vn ln thot khi kh khn. n cui nm2010, trn a bn x Lin Hip l 199 h gm 980 khu v 32 h cn ngho.

    V vn ha - thng tin, th dc th thao: Tham gia mt s hot ngvn ha - th thao do huyn t chc nh: gii bng 7 ngi, gii bng 11ngi, lin hoan quan h qun chng Nm 2005 thn Ngha Hip c cng

    nhn l thn vn ha, nm 2010 cng nhn 2 thn l thn An Hip v Tn Hip.Gia nh vn ha nm 2010 t t l 77,8%.

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    An ninh quc phng:

    Xy ra 05 v phm php hnh s ch yu trm cp ti sn thit hi trn 12triu ng v 11 v vi phm hnh chnh gy ri trt t cng cng. Xy ra 04 vtai nn giao thng lm cht 4 u l ngi a phng khc. Ch o lc lng

    cng an v cc ngnh lin quan tng cng kim tra vic chp hnh lut giaothng ng b v Ngh quyt 32/CP v gp phn lp li trt t an ton giaothng trn a bn huyn.

    Cng tc qun l nhn khu tt, trong nm c 34 lt Vit kiu v thm gianh, tt c u c ng k v chp hnh tt cc quy nh trong thi gian tia phng.

    Cng tc xy dng, cng c lc lng dn qun thng xuyn c chtrng, nng cao cht lng theo quy nh ca ngnh. Cc nhim v trng tm v

    qun s nh: hun luyn qun s, tuyn qun, ng k v khm sc khe cc tui c trin khai ng k hoch v t kt qu tt. Triu tp c 22 chins tham gia hun luyn binh chng theo lnh iu ng. Nm 2010, pht lnhnhp ng 14 thanh nin, giao qun 9 thanh nin.

    1.4. Mc tiu ca d n ci to, phc hi mi trng

    1.4.1. Mc tiu chung

    Ci to, phc hi mi trng khu vc m m bo yu cu v bo v mitrng v phc v cc mc ch c li cho con ngi.

    1.4.2. Mc tiu c thCn c vo iu kin thc t khai thc, ch bin ti khu m v a hnh

    hin trng o v trong thi im lp d n ny, cng tc ci to, phc hi mitrng s c tin hnh vi cc hng mc nh sau:

    a. Ci to, phc hi mi trng khu vc sn cng nghip

    Ti khu sn xut, ch bin

    - Tho g h thng p - nghin - sng: tho g h thng p - nghin-sng cng sut 50 m3/h ti khu vc sn cng nghip.

    - Co bc, san gt t ti khu vc ng ln xung mt bng khu cp liu.

    Khu vc vn phng, nh , nh xng, kho vt t thit b

    - Tho g cc cng trnh khu vn phng nh xng nhkho.

    - San gt mt bng v trng cy mt bng sn cng nghip

    b. Ci to, phc hi mi trng khu vc moong khai thc

    - Gia c b m.

    - Lp t bin bo nguy him.- San lp khu vc y moong khai thc v trng cy.

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    c. Trng cy ti khu vc ci to

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    CHNG 2

    C IM CNG TC KHAI THC KHONG SN

    2.1. Khi qut chung v khu vc khai thc khong sn2.1.1.iu kin a cht khu vc

    2.1.1.1. a cht khu vc

    Theo bo co a cht-khong sn nhm t Bn Kh ng Nai t l1:200.000 do k s Nguyn c Thng ch bin (xut bn nm 1988) v theoti liu cc t bn t l 1:50.000 nh: nhm t Lt, nhm t Ty Sn,nhm t Bc Lt v Bn a cht & Quy hoch Khong sn tnh Lmng th cu trc a cht khu vc c cc thnh to a cht nh sau:

    a. a tng

    - H t, thng Pleistocen, ph thng trung h tng Xun Lc(BQ12xl)

    Thnh phn thch hc gm; dm tuf, bazan l hng, bazan c st xen knhau. c mu xm xanh sm, xm ghi, xm pht nu.

    Trn b mt cc ca h tng b phong ho, bn phong ho mnh m hnhthnh nn i phong ho bt st mu nu vi b dy thay i t 3 5m. Cc bazan ca h tng l ngun vt liu xy dng thng thng kh phong phca a phng.

    - H tng n Dng (K2d)

    H tng n Dng bao trm ton b khu vc thm d. Thnh phn thchhc ca h tng gm hai loi:

    Phun tro thc th dacit, ryodacit, felsit, ryolit, andesitodacit v cc vn kttuf ni la ca chng. y l i tng thm d ca Khai thc v ch binkhong sn M xy dng Ryolit.

    Khong sn lin quan ca h tng ny gm xy dng v kaolin phong ha.- Trm tch thm sui (aQ13)

    Hnh thnh ti lu vc cc con sui ln to nn cc thung lng rng 0,50,7km, di 4,0 5,0km. Thnh phn gm ct, cui si kt, dy t 3 5m.

    - Trm tch bi bi ven sui (aQ23)

    B dy trung bnh thay i t 2 4m, thnh phn gm ct, cui si xen lnt mn thc vt.

    b. Magma

    Trong khu vc ln cn ca Khai thc v ch bin khong sn M xydng Ryolit khng c cc thnh to magma xm nhp.

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    c. Kin to - a mo

    - Ph hy t gy

    Trn phm vi vi chc km2 quanh khu vc thm d tn ti mt s t gytheo phng B-TN th nm nghing v TB, chng lm nt v cc trm tch

    phun tro trung tnh h tng n Dng.

    Trong phm vi din tch nghin cu khng tn ti h thng t gy ln mch thy h thng khe nt vi th nm 300 3300 < 45 500 lm cho riolit,andezit b nt v.

    - c im a mo

    Khu vc thm d Khai thc v ch bin khong sn M xy dng Ryolitnm ngay sn Ty Nam ca nh ni c cao 1.134,8m, Ton khu vc quanhm c cao b mt a hnh t 1.041m n 1.086m hi nghing v ng Nam.Vi c im a hnh nu trn c th chia khu m thnh cc dng a hnh sau:

    - B mt a hnh xm thc bc mn: phn b khu vc pha ng vngnghin cu, pht trin andeit. B mt a hnh c dng i ni thp ko ditheo phng kinh tuyn, nh bng, ng phn thy rng.

    - B mt a hnh bo mn tch t: l a hnh tng i bng phng, cao khong 1.041 1.086m. Vi dng a hnh sn thoi 10 250 phn b dcsn ni.

    - a hnh tch t: pht trin dc theo thung lng sui pha Ty v Nam khu m,

    to cc bi bi v thm bc I rng 500 700mt; thnh phn l ct, cui si, st.2.1.1.2. a cht khu m

    - c im a cht

    Ti khu vc m, ryolit l ra mt phn din tch khu vc pha Ty Namkhu m, cn hu ht l tng phong ha ryolit thuc h tng n Dng(K2d). B dy tng ph thay i t 0,0 2,0m, trung bnh 1,5m. T cc vt l,moong khai thc v ti liu khoan cho thy ranh gii khi ti rt r rng,khng c hin tng phong ha tng dn theo chiu su, ht tng phong ha trit

    l ti tng ti.- c im thch hc khong vt

    Thnh phn thch hc gm: andezit, ryolit, dacit mu xm en, xanh enht mn, c kin trc ht, cu to phn lp dy i khi cu to khi.

    Thnh phn khong vt gm: cc ht vn tinh th, ht vn c gn ktcht ch bng khi nn vi ht bin i.

    Phn ht vn: hu ht c dng ht nhiu gc cnh, sc cnh, mi trnkm, c kch thc hay gp l 0,08mm n ht to 1,8mm,thnh phn ht vn mu ny gm mt s ht vn tinh th plagioclas (b st, sericit ho yu, tng

    phn), fenspat kali loi orthoclas, b st ho m c, thch anh c gc cnh.

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    Phn kh nn: l tp hp gm silic, cc vi thch anh, fenspas bin i kchthc rt b khng phn bit r, khong vt st, sericit v kh nhiu ht khongvt nh mu en, khng thu quang.

    - c im thch a ho khong ha

    + Thnh phn ha hc

    Kt qu ho silicat cho thy thuc nhm phun tro trung tnh-acit hmlng Na2O > K2O. So snh thnh phn ha cu xm nhp trong khu m vithnh phn ha trung bnh ca theo Deli (Hunh Trung, 1988) c th nhnthy tng ng vi cc phun tro trung tnh-axit. Trong cha thnh phn chi SO3 rt nh, trung bnh 0,35%.

    + Khong ha lin quan khc: i vi phun tro trung tnh-acit: andezit,riolit, dacit mt s ni khc c hin tng dp v gy nn bin i propilit ha

    lin quan ti khong sn vng, bc. Thc t ti m ny andezit, riolit, dacitkhng b bin i propilit ha, khng cha cc mch thch anh mang qung, nnqua kt qa nghin cu dc theo a tng cc l khoan, l trnh a cht, ccnghin cu thch hc khong vt di knh hin vi phn cc v kt qu mu gii u khng h thy cc biu hin khong ha nu trn.

    2.1.1.3. a cht thy vn

    a. c im cht lng nc mt

    Nc mt

    M xy dng Ryolit nm trn a hnh sn thoi. B mt a hnh thpnht khu vc m c cao 1.041 m, sn pha ng Bc ca nh ni cao1.134,8m, sn thoi 15-200 trn b mt l lp v ryolit phong ha hon tonthnh st ln dm cc, pha ngoi chn ni a hnh tch t, do sn dc nn khnng thot nc trn ni rt nhanh v chy trn ra xung quanh, v vy nc mthu nh t gy nh hng n cng tc khai thc m, thm ch k c nhngthng ma ma.

    V pha Ty v ng Nam khu vc m khong 1,2km c cc dng suiln, chiu di khong 8-10km, lng sui rng 5-6m c nc chy quanh mt vich cn to nn thc cao 3-4m. Trong khu vc m c cc khe cn ch c ncvo ma ma. Chnh cc khe cn ny ng vai tr quan trng cho cng tc thotnc ca m trong qu trnh khai thc vo ma ma cho c khu m, trong iukin a hnh, a cht hin ti sui cn l min thot ca nc di t. Do vyqu trnh khai thc sau, nc ma v nc ngm s c thot t chy v phnc a hnh thp v dn vo sui cn nm v pha Ty v ng Nam ca khum. V vy, cc dng nc mt ny t nh hng n cng tc khai thc.

    Nc di t

    Cn c vo cu trc a cht m, c im thnh phn thch hc v khnng cha nc ca cc tng t kt hp kt qu kho st ti cc l trnh a

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    cht thy vn, kt qu kho st a cht thy vn ti cc cng trnh khoan. Cctng a cht thy vn c phn chia nh sau:

    + Tng cha nc trong i phong ho ca gc: i phong ha c chiudy thay i t 0,0-2,0m, trung bnh 1,5m. Thnh phn gm: St ln dm sn v

    mnh cc tuf andesitodacit, tuf dacit, tuf ryodacit. Kh nng cha nc catng thuc loi trung bnh. Min cung cp nc cho tng ny l nc ma ritrc tip.

    + Tng cha nc trong tuf andesitodacit, tuf dacit, tuf ryodacit: Phnb su t 2,0m n 66,0m. y l tng tuf andesitodacit, tuf dacit, tufryodacit cu to khi, t nt v, kh nng cha nc mc km v lngnc ngm trong khu vc m mc km. Min cung cp nc cho tng ny lnc ma v nc trong cc i phong ha t cc khu vc cao.

    b. Lng nc vo m Nc ma ri trc tip

    Lng nc ma chy vo moong khai thc c tnh theo cng thc:

    Q = 0,278 x k x I x A (*)

    Trong :

    + k: h s dng chy, k = 0,3 (p dng cho vng t trng)

    + I: cng ma cao nht, I = 75 mm/h = 0,075 m/h. (S liu nin gim

    thng k ca tnh Lm ng trong vng 20 nm vi tn sut 10%).+ A: din tch lu vc, ly bng moong khai thc, A= 50.000 m2

    Thay s vo ta c lng ma ri trc tip vo moong ngy ln nht l:

    Q = 0,278 x 0,3 x 0,075 x 50.000 = 312,75 m3/gi = 7.506 m3/ngy

    (*) Ngun: L Trnh, nm 1997, Quan trc v kim sot nhim mitrng nc, Nh xut bn Khoa hc v K thut, H Ni)

    Nc di t

    Nc ngm trong khu m phn b su t 7,0m tr xung. y l tngtuf andesitodacit, tuf dacit, tuf ryodacit cu to khi, t nt v, kh nng chanc km, lng nc ngm trong khu vc rt rt ngho. Min cung cp nccho tng ny ch yu l nc ma v nc trong cc i phong ha tufandesitodacit, tuf dacit, tuf ryodacit t cc khu vc cao.

    Theo tnh ton ca bo co thm d lng nc ngm chy vo m tnhcho din tch moong 5 ha l 489 m3/ngy.

    Vy tng lng nc ma chy vo m: Q = 7.506 + 489 = 7.995 m3/ngy

    2.1.1.4. a cht cng trnhc im a cht cng trnh ca khu m da vo cc yu t: Cu trc a

    cht, c im a hnh a mo, a cht thu vn, cc qu trnh a cht ng

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    lc v cc tnh cht c l ca t . Cc c im ny m t chi tit trn,phn ny ch trnh by cc qu trnh a cht ng lc v cc tnh cht c l cat .

    c im c l ca t

    Cn c vo ti liu kho st a cht cng trnh, cc cng trnh thm d vmoong khai thc th, da vo c im thch hc v kt qu phn tch tnh chtc l ca , t trn xung c th phn chia thnh cc tng a cht cng trnhnh sau:

    - Lp 1 (lp ph): i phong ha c chiu dy thay i t 0,0-2,0m, trungbnh 1,5 m. Thnh phn gm: St ln dm sn v mnh cc , chiu dy lpny thng thay i ch yu t 1,0 m n 2,0 m dy trung bnh 1,5 m.

    c im c l ca

    - Lp 2 ( gc ti): cng chc c dung trng t 2,72g/cm3 - 2,73g/cm3

    trung bnh 2,725g/cm3; cng khng nn bo ho t 948-1085kG/cm2, trungbnh 1016,5 kG/cm2, ht nc t 0,05% - 0,06%, trung bnh 0,055%; lcdnh kt bo ha 233kG/cm2-263 kG/cm2, trung bnh 248kG/cm2; gc ma st boha t 37050-38050, trung bnh 380 20. Nhng ch tiu c l nu trn chothy c bn c hc tng i cao, tnh chu nc cao p ng yu cu lm xy dng (tiu chun Vit Nam 7570-2006).

    Cc hin tng a cht ng lc cng trnh

    Kt qu khoan thm d v phn tch th nghim mu cho thy trong phmvi m, iu kin a cht cng trnh n nh. Khu vc m gc hon ton bche ph bi lp st phong ha hon ton ch l ra trn din tch nh khong300m2 pha Ty Nam. Trn c s c im a cht, a cht thy vn cc hintng a cht ng lc c th xy ra trong khu m gm:

    B mt ton b khu m l lp phong ha ca , thnh phn l st ln snsi, dm sn c h s rng ln d gy ra hin tng xi mn b mt to thnhcc rnh xi, mng xi vo ma ma gy kh khn cho hot ng khai thcm. Lp ph cn bc b trnh hin tng tng tr nc ngm nh hng ti

    khai thc m. Do a hnh khng qu cao, vch dc trung bnh v vy vic khaithc kh thun li.

    2.1.2. Khi qut v khu m

    2.1.2.1. Tin

    Qu trnh khai thc Khai thc v ch bin khong sn M xy dngRyolit c phn chia thnh 04 giai on nh sau:

    - Giai on 1- Giai on chun b ca d n: Giai on ny thc hin cng tctha thun n b. c thc hin ngay sau khi d n c cp php khai thc.

    - Giai on 2 - Giai on thi cng xy dng: Bc ph, m va, ci to ng...Thc hin trong thi gian 0,5 nm.

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    - Giai on 3 - Giai on khai thc: Khai thc n nh t cng sut thit ktnh t khi kt thc xy dng c bn cho n khi chun b giai on ng cam. Thi gian khai thc 25 nm.

    - Giai on 4 - Giai on ng ca m, kt thc khai thc: Tin hnh bc

    xc v vn chuyn ht s ti nguyn, tho d trang thit b phc v sn xut, tinhnh ci to, phc hi mi trng, thi gian thc hin 0,5 nm.

    2.1.2.2. Cng sut

    Sn lng hng nm ca m cho nguyn khai l 88.200 m3/nm(tnh theo h s n ri 1,4 v h s tn tht 0,9), sau khi ch bin nghin- sng(tnh theo h s tn tht khong 10% ch yu i vi mi & bi) sn lng thnh phm l 88.200 * 0,9 = 79.380 m3.

    (Ngun: Thit k c s D n Khai thc v ch bin khong sn M xy

    dng Ryolit ti thn Gn Reo, x Lin Hip, huyn c Trng, tnh Lm ng)2.1.2.3. Tr lng

    Tr lng a cht (Qc)

    Cn c vo Quyt nh s 1673/Q-UBND ngy 04/8/2011 v vic phduyt tr lng trong bo co thm d Khai thc v ch bin khong sn M xy dng Ryolit ti thn Gn Reo, x Lin Hip, huyn c Trng, tnh Lmng, tng tr lng a cht ca m l 2.350.000 m3 cp tr lng 121.

    Theo tnh ton ca bo co thm d Khai thc v ch bin khong sn M xy dng Ryolit, tr lng t ph l 75.000m3.

    Tr lng khai thc

    Theo quyt nh s 1673/Q UBND ngy 04/8/2011 ca y ban nhndn tnh Lm ng, tr lng khai thc l Qkt = 1.726.000 m3 v tr lng

    phi li trong tr bo v b moong l 624.000m3.

    H s t bc bng tng khi lng t ph trn tng tr lng khaithc: K = QP/QKT 75.000/1.726.000 = 0,043. Nh vy, h s t bc choton m l 0,043, ngha l c khai thc 1m3 th s phi bc 0,043m3 t ph.

    QKT= QC QBV = 2.350.000 624.000 = 1.726.000m3

    2.1.2.4. Tui th m

    Tui th ca m c xc nh nh sau:

    T = TCB + TKT + T nm

    Trong :

    + TCB Thi gian xy dng c bn bao gm cc cng vic: Bc t tng phto mt tng khai thc u tin, lm ng ho vn chuyn trong m, xy dng

    b k lp t my nghin sng, xy dng cc cng trnh ph tr v.v. Thi gianxy dng c bn c xc nh l TCB = 0,5 nm.

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    + T l thi gian ci to, phc hi mi trng, ng ca m.

    D kin l T = 0,5 nm.

    + TKT Thi gian khai thc vi cng sut thit k, c xc nh nh sau:

    TKT = QKT/A, nm+ QKT Tr lng khai thc = 1.726.000m3

    A Cng sut khai thc nguyn khi ca m trong 1 nm = 70.000 m3

    Thay s: TKT = 1.726.000m3/70.000 = 24,66 nm (ly chn 25 nm)

    Nh vy tui th m T = 0,5 + 25 + 0,5 = 26nm.

    2.1.2.5. Ch lm vic

    Ch lm vic ca m nh sau:

    - S ngy lm vic trong nm: 280 ngy/nm- S ca lm vic trong ngy: 1 ca/ngy

    - S gi lm vic trong ca: 8 h/ca, gi lm vic ca xe my l 7 h/ca.

    2.1.3. Hin trng khu vc d n

    D n cha tin hnh bc lp t ph trong din tch khu vc khai trng,khi lng t bc sau ny mt phn s dng trong giai on xy dng c bn, mt

    phn chuyn thng ti ni cn san lp trong khu vc, cn li vo bi thi ngoi,phc v cho cng tc ci to, phc hi mi trng khi kt thc khai thc.

    Quang cnh xung quanh khu m l nhng l c ph v hoa mu ca ngi dn.Cch khu m 1.000m c tri chn nui tp trung.

    Nhn chung M xy dng Ryolit vn cn kh nguyn dng a hnh s khai.

    2.2. Phng php khai thc

    2.2.1. Phng php khai thc

    Phng n khai thc c chn l: khai thc lp nghing ct tng ln tcote +1.060m ti cote +1.085m v t cote +1.060 n cote +1.020 (T di ln,

    t ngoi chn ni vo gia ni)2.2.2. Trnh t khai thc v h thng khai thc

    2.2.2.1. Trnh t khai thc

    gi n nh b moong cng tc, bo m an tan trong qu trnh khaithc, dng vn chuyn c ti ch yu xung dc, thot nc t chy... hngtin chung ca m l t pha Ty-Nam sang ng-Bc ti bin gii ca m vxin t di ln trn. Hn ch vic t tng ph b ma tri xung lm bn cctng khai thc v ng vn chuyn trong m.

    2.2.2.2. H thng khai thc

    Cc thng s ca h thng khai thc nh trong bng sau:

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    STT Thng sK

    hiun

    vGi tr

    1 Chiu cao tng khai thcTrong t ph Ht m 0

    Trong gc 10,0

    2 Chiu cao tng kt thcTrong t ph Hkt m 0

    Trong gc 20,0

    3Gc nghing sn tngkhai thc

    Trong t ph t 45

    Trong gc K 75

    4Gc nghing sn tngkt thc

    Trong t ph KT 25Trong gc KT 70

    5 S tng khai thc ton m n tng 6

    6 Chiu rng di khu A m 12,07 Chiu rng ai bo v khi kt thc Bbv m 7

    8 B rng mt tng cng tc ti thiu Bmin m 34

    9 Chiu di tuyn cng tc Lkt m 50

    10 Gc nghing b kt thc 5611 Chiu rng ng cho 2 xe chy T m 7,012 Chiu rng ai vn chuyn XVC m 1013 Tin chu k khai thc Lck m 21

    14 Thi gian tin chu k khai thc Tck thng 3(Ngun: Thit k c s D n Khai thc v ch bin khong sn M xy

    dng Ryolit)

    2.2.3. Quy trnh cng ngh khai thc v ch bin

    Quy trnh cng ngh khai thc, ch bin v lu pht thi c trnh bynh sau:

    Hnh 2.1: Quy trnh cng ngh khai thc

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    (Ngun: bo co nh gi tc ng mi trng D n Khai thc v ch binkhong sn M xy dng Ryolit).

    Thuyt minh cng ngh

    Khu vc m c bc tng ph, sau tin hnh khoan n mn, lng qu c sinh ra trong qu trnh n mn khong 5% c dng ba thy lc p.

    22

    Bc tng t + phong habng my o

    Bc tng bn phong ha bngkhoan n mn

    Khoan khai thc bng khoan ln

    N mn lm ti bng phngphp n vi sai phi in kt hp

    dy n xung l khoan

    Xc nguyn liubng myo

    Vn ti t gng khai thc ln

    khu ch bin bng t t

    Nghin sng bng h thngp - nghin - sng

    nCht thi rnKh thi

    n, chnng, rungnBi, kh thi vng

    nBi

    X l ln bng

    ba pthy lc

    nBiKh thi

    nBi

    Thayicnhquanahnh

    Sn phm

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    sau khi c ph dng my xc v t t chuyn v khu ch bin ch bin thnh thnh phm, thnh phm c a vo kho bi hoc vnchuyn n ni tiu th. Trong trng hp khch hng mua nguyn khai cth vn chuyn trc tip t m n ni tiu th, khng cn qua khu ch bin.

    Cng tc khoan n mnKhai thc v ch bin khong sn M xy dng Ryolit c cng sut khai

    thc nh, sn lng trong mt t n t nn c th s dng phng php nmn l khoan nh ph qu c hoc dng ba p thy lc gn trn myxc thy lc gu ngc.

    Trong trng hp x l m chn tng; m ng; o rnh hoc nhngv tr chiu cao tng khai thc H < 3m th cn n mn l khoan nh d = 36mm.

    Tnh ton tng t nh trong n mn l khoan ln vi chiu cao tng tiu

    chun 3m, khoan thng ng.

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    Hnh 2.2: S khi quy trnh tin hnh cng tc khoan n mn

    Bng 2.1: Khi lng vt liu n cng nghip cn s dng

    TT Loi vt liu n v L khoan ln L khoannh Tngcng1 Thuc n cc loi kg 25.956 2.596 28.5522 Mi n loi 175g/qu qu 540 5403 Kp phi in trn mt ci 540 5404 Kp phi in xung l ci 540 5405 Kp in vi sai Ci 600 606 Kp n tc thi Ci 60 607 Dy dn in nh m 2.500 3.000 5.500

    (Ngun: Thit k c s D n Khai thc v ch bin khong sn M xydng Ryolit).

    24

    Bi, n,Kh thit vng

    Chn ng

    Chun b mt bng khoan

    Lp h chiu khoan

    Trin khai h chiu khoan ra thc a

    Khoan to l bng my khoan thy lc

    Nghim thu l khoan

    T chc thi cng v n mn

    Kim tra

    Chuyn sang khu xc bc v x l qu c bngba p thy lc

    t Khng t

    Bi, n,Chn ng

    Lp h chiu khoan n mn

    t Mn cm

    t Khng t

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    Cng tc xc bc

    - Xc t ph: Khi lng t tng ph ton m khong 75.000 m3, dkin s bc ht trong 3 nm u k t khi m hot ng. Nh vy, khi lngvn ti t tng ph hng nm khong 25.000 m3/nm. B tr my xc

    1,2m3/gu xc t ph ca m, cng sut thc t 89 m3/ca/nm. Nh vy tythuc vo tin bc ph c th trong nm, my xc bc t ph s di chuynt khu vc ny sang khu vc khc trong moong hon thnh khi lng bc

    ph ca m.

    - Xc nguyn khai: B tr my xc 1,2m3/gu xc nguyn khai88.200 m3/nm, cng sut thc t 500 m3/ca.

    - Xc thnh phm: B tr my xc lt (bnh lp) 1,2m3/gu xc thnh phm 79.380 m3/nm, cng sut thc t 450 m3/ca.

    - Dng ba thy lc ph qu c: Khi lng qu c hng nmchim 5% lng nguyn khai n mn ca m, cng sut thc t 25 m3/ca.

    Cng tc vn ti

    Khong cch vn ti trung bnh t khai trng ti khu nghin sng ca mbnh qun l 300m.

    Vn chuyn ngoi m thng do phng tin ca khch hng m nhn.Nu Cng ty C phn a c Lt c phng n giao ti chn cng trnhcho khch hng th ty theo iu kin c th thnh lp i vn ti ngoi m hoc

    Hp ng thu vn ti ring.

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    Cng ngh ch bin

    Hnh 2.3: Quy trnh cng ngh ch bin

    Ngun: Thit k c s D n Khai thc v ch bin khong sn M xydng Ryolit.

    Thuyt minh cng ngh:

    nguyn khai c t ch t moong khai thc vo Bunke, t Bunkecp liu c a vo my p hm s cp hoc my p ba. Ri cho qua snglc t ct ln 1, phn trn sn cho ra 4x6 v 0x4, phn di sng chuyn trctip vo my nghin cn nh bng chuyn xch. Sau khi nghin cho ra cc sn

    phm 2x4, 1x2 v mi. Cc ny qua bng ti ra bi cha tng loi.

    26

    nguyn khai

    My p hm s cphoc my p ba

    Sng cp 1

    Nghin cn(th cp)

    4x6 0x4

    1x22x4 mi

    ( mi)

    Sng cp 2

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    2.2.4. Danh mc my mc thit b

    Danh mc my mc thit b c trnh by bng sau:

    Bng 2.2: Thng k cc my mc thit b ch yu ca m

    STT Hng mc c tnh k thutS

    lngNc sn

    xutTnh

    trng %

    1My khoan lnh

    ng knh 30 -42mm

    2 ci Nga 90

    2 My khoan lnng knh 105mm

    2 ci Vit Nam 90

    3 My nn kh lnKobelco, 75 KW,

    17,5 m

    3

    /pht

    1 ci Nht 90

    4My xc thylc

    Bnh xch, gunghch 1,2 m3

    1 ci Nht 80

    5My xc thnh phm

    Komatsu, bnhlp, gu thun 2,3m3

    1 ci Nht 80

    6Ba thy lc ph qu c

    Tng thch myxc nghch

    1 ci Hn Quc 80

    7 t ch trong m Dung tch thng12 m3 2 ci Hn Quc 80

    8My ko c rmooc

    R-mooc + bnnc 5 m3

    1 cp Nht 100

    9H thng nghinsng

    Cng sut 50m3/gi

    1 HT Nht 90

    10Trm bin th22/0,4 kV

    Cng sut 250kVA

    1 trm Vit Nam 90

    11 My pht innh

    Cng sut 5kVA 1 ci Vit Nam 100

    12 My bm nc 2KW 1 ci Vit Nam 90

    13My xc thylc

    Bnh xch, gunghch 0,9 m3

    1 ci Nht 90

    (Ngun: Thit k c s d n Khai thc v ch bin khong sn M xydng Ryolit ti thn Gn Reo, x Lin Hip, huyn c Trng, tnh Lm ng)

    2.2.5. Nhu cu nguyn, nhin liu v cc chng loi sn phma. Nguyn, nhin, vt liu u vo

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    Ngun nhin liu cn cho khai thc l du Diesel c mua t cc trmxng du gn nht ti a phng. Nhin liu s dng cho my mc thit b nh:my pht in, xc , my gt, t vn chuyn lng du Diesel c tnhkhong: 80.220 lt/nm (mt ca s dng 293 lt du DO, Ngun: D n u t

    Khai thc v ch bin khong sn M xy dng Ryolit).Bng 2.3: Vt t, nguyn liu cn thit phc v m

    STT Khon mc VTMc tiuhao/nm

    Vt liu n1 Thuc n cc loi kg 28.552

    2 Mi n loi 175g/qu qu 540

    3 Kp cc loi ci 1.200

    4 Dy dn in m 5.500

    Ph tng thay th8 Mi khoan mi 90

    9 Cn khoan f 22 mt 20

    10 Dy hi b 3

    11 Dy ai an ton b 18

    12 Qun o, nn, dng c BHL b 46

    (Ngun: D n u t Khai thc v ch bin khong sn M xy dngRyolit)

    b. Sn phm ca d n

    Sn lng thnh phm l 79.380 m3. S b d kin mt s loi thnhphm sau:

    + 4x6 (10% tng sn lng): khong 7.938 m3

    + 0x4 (20% tng sn lng): khong 15.876 m3

    + 1x2 (55% tng sn lng): khong 43.659 m3

    + 2x4 (10% tng sn lng): khong 7.938 m3

    + mi + bt (5% tng sn lng) : khong 3.969 m3

    (Ngun: Thit k c s D n Khai thc v ch bin khong sn M xydng Ryolit ti thn Gn Reo, x Lin Hip, huyn c Trng, tnh Lm ng)

    2.2.6. H tng k thut

    2.2.6.1. Giao thng vn ti

    a.ng tm

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    Tuyn ng tm s dng phc v cng tc bc ph ca m, thi gian tnti khng qu 1 nm. ng tm chy ngay trn nn t t nhin ca m, chsan gt trn mt.

    b. ng vn chuyn chnh

    Tuyn ng vn ti chnh ca m bao gm ng ni b m v ngngoi m. Tuyn ng chy t tng khai thc, bm theo b dng ra ng vnchuyn chnh ti mng cp liu ca H thng nghin sng v sn cng nghipca m ri ra tuyn ng vn chuyn lin x.

    Mt ng rng 810m, nn tri dm, hai bn ng c rnh thot ncrng 0,7m su 0,4m, chiu di khang 0,5 km ti ng lin x l ng cp phi.

    c. Kt cu tuyn ng trn tng khai thc

    on ng tng trong khu khai thc c o trn nn t nhin ca m.

    Chiu rng mt ng phi rng b tr di vn ti cho 2 ln xe chy,cc khong cch an ton v chiu rng rnh thot nc.

    2.2.6.2. H thng thng tin lin lc

    H thng thng tin lin lc ni b s dng tng i t ng kt ni 02 linein thoi bn v my Fax. Kt hp mng Internet hin hu.

    Ngoi ra trang b in thoi di ng cho cn b iu hnh, qun l.

    Phc v quan h giao dch vi bn ngoi s dng xe gn my v t. Cng

    vn giy t theo ng bu in.2.2.6.3. H thng cp in v chiu sng

    a. Nhu cu s dng din

    Cc h s dng in trong m ch yu l h thng nghin sng v my nnkh khoan s dng in 3 pha.

    Cc thit b sinh hot, vn phng v chiu sng s dng in sinh hot mtpha thng thng.

    b. Ngun cung cp inM lp t trm bin th v ng dy u ni vo li in trung th ca

    a phng. K Hp ng mua bn in vi in lc qun l khu vc m.

    c. Chiu sng

    M hot ng 01 ca/ngy, thi gian hot ng t 7 gi sng n 5 gichiu trong iu kin nh sng mt tri bnh thng nn khng cn phi xydng h thng chiu sng cho thit b v cng nhn khai thc.

    H thng chiu sng c lp t n gin cho khu vn phng v bo v

    m bng cc bng n hunh quang. Khu vc h thng nghin sng gn 3 bngn cao p trn cc tr cao.

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    2.2.6.4. T ng ha

    Vic vn hnh trm ch yu bng nhn cng vn hnh trc tip.

    Lin lc, iu hnh gia cc cng on sn xut trong m s dng h thngtng i v my b m ni b.

    kim sot vic tiu th thnh phm c th dng cc phn mm kthp trm cn t in t.

    2.2.6.5. Cp nc v nhu cu s dng nc

    Ngun cp nc cho sinh hot: s dng nc ging khoan cung cp ncphc v cho sinh hot.

    Ngun cung cp cho sn xut: Nc c ly t h thu nc to ra trongkhu vc khai thc hoc ly t cc ao, h, sng sui quanh khu vc m.

    Nc cho sn xut ch yu phc v phun sng dp bi h thng nghinsng v ti chng bi mt bng khu vc ch bin v ng vn chuyn trong,ngoi m.

    + Nhu cu nc s dng cho sinh hot, n ung

    Cc h tiu th nc sinh hot gm khu vn phng m v cng nhn m.Tng s lao ng trong m d kin 20 ngi. Theo TCXD 33:2006 ca B Xydng nhu cu s dng 120 lt/ngi/ngy, nhu cu dng nc ti m l:

    20 ngi x 120 lt/ngi/ngy = 2.400 lt/ngy = 2,4 m3/ngy

    + Nhu cu nc s dng cho sn xut

    - Trm nghin sng : nc c cung cp di dng phun sng chng bi. Nhu cu tiu th 0,4 m3/h; 2,8 m3/ca.

    Lng nc s dng ti ng vo ma kh: TCXD 33:2006 ca BXy dng, lng nc ti ng bng xe c gii chn 0,5 l/m 2. D kin lngcn s dng ti ng ni b l 10 m3/ngy.

    Tng nhu cu s dng nc phc v sn xut khong 15 m3/ngy.

    2.2.6.6. Thot nc mNc ma v nc ngm

    Ton b lng nc ma chy qua khu vc khai thc ca m c thu gombng h thng cng, rnh l thin. Sau , chy qua h lng cc thnh phn t b cun theo, lm trong nc trc khi chy vo h thng khe sui t nhin.

    Nc thi

    Lng nc dng trong sinh hot khu vn phng m c thu hi thngqua h thng x l nc thi (hm, b t hoi) v thot nc ra rnh dc ng

    vn chuyn ti sui cn gn nht.

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    2.2.6.7. Bi thi

    M xy dng Ryolit c lp ph rt mng nn khi lng khng nhiu.D kin khi lng bc khong 75.000 m3/nm trong 3 nm u mi nm thchin bc 25.000m3 l ht khi lng tng ph.

    Nh vy, ngoi mt phn t ph c Cng ty bn cho n v c nhu cusan lp, khi lng cn li c vo bi thi ngoi s dng cho vic sangt y moong sau ny trng cy.

    2.2.7. Tng mt bng

    a. Khai trng: Khai trng khai thc gm ton b din tch m xcnh trong phn "bin gii m" l 5,0 ha.

    b. Mt bng sn cng nghip: Mt bng khu ch bin c b tr cch khaitrng khong 300 m.

    Din tch mt bng sn cng nghip m trn din tch khong 9.213m2

    gm:

    - Khu lp t H thng trm in, H thng nghin-sng v bi cha thnhphm: 4.000 m2 .

    - Khu Vn phng; nh n, nh CNV; trm cn -t... b tr pha ngoisn cng nghip ni u ni vi ng lin x. Din tch khong 500 m2.

    - Khu Xng sa cha C-in; kho vt t, kho mn b tr pha ngoi sn

    cng nghip ni u ni vi ng lin x. Din tch khong 900 m

    2

    trong din tch kho mn v hng ro bo v 400m2.

    - ng ni b v bi u xe trong sn cng nghip khong 2.000 m2.

    Ngoi ra, d n cn s dng t lm bi thi t nm ngoi sn cngnghip, din tch 5.000m2.

    2.3. Hin trng mi trng

    2.3.1. Hin trng cht lng mi trng khng kh xung quanh

    Cn c vo hng gi ti thi im o c v hnh dng khu m, Ch d

    n phi hp vi cc n v quan trc tin hnh ly hai mu khng kh, v trly mu c ta nh sau:

    Bng 2.4: V tr ly mu khng khSTT K hiu V tr Ta

    1 KK1 Khu vc khai trng D nX = 1.303.654Y = 568.170

    2 KK2 Khu vc sn cng nghipX = 1.303.599Y = 568.019

    Thi gian ly mu: ngy 15/08/2011. iu kin thi tit ly mu: tri nng,gi nh.

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    Bng 2.5: Kt qu phn tch mu khng kh xung quanh

    Ch tiuim o

    Tc gi

    (m/s)

    n(dBA)

    Bi(mg/m3)

    CO(mg/m3)

    SO2(mg/m3)

    NOx(mg/m3)

    KK1 2,0 50 52 0,11 2,14 0,053 0,030KK2 2,1 55 57 0,20 3,10 0,060 0,052

    QCVN05:2009/BTNMT

    - 0,30 30 0,35 0,2

    QCVN26:2010/BTNMT

    70 - - - -

    Ngun: Trung tm t vn Cng ngh mi trng v An ton v sinh lao ng.

    Ghi ch:

    - V tr cc im o c ly mu cht lng mi trng khng kh c thhin trn bn v tr ly mu c nh km vo phn ph lc ca bo co.

    - QCVN 05:2009/BTNMT: QCKTQG v cht lng khng kh xung quanh

    - QCVN 26:2010/BTNMT: QCKTQG v ting n

    Nhn xt: So snh kt qu phn tch vi QCVN 05:2009/BTNMT-QCKTQG v Cht lng khng kh xung quanh cho thy cc thng s phntch u nh hn Quy chun cho php nhiu ln. iu ny cho thy cht lngkhng kh ni y tng i tt.

    2.3.2 Cht lng nc ngm

    Kt qu phn tch mu nc ngm trong khu vc d n ti v tr sau:

    Bng 2.6: V tr ly mu nc ngmSTT K hiu V tr Ta

    1 GR4 L khoan 4X = 1.303.556Y = 568.340

    Thi gian ly mu: ngy 04/5/2011. iu kin thi tit ly mu: tri nng,gi nh.

    Bng 2.7: Kt qu phn tch ha l

    STT Ch tiu phn tch n vKt qu QCVN

    09:2008/BTNMTGR41 pH - 6,52 5,5 8,52 cng tng qut meg/l 2,00 5003 Cl- mg/l 7,09 2504 SO4-- mg/l 24,02 4005 NO3- mg/l 0,49 15

    6 NO2-

    mg/l 0,01 1,0

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    Ngun: Phiu kt qu phn tch s 086-TN11, Cng ty TNHH Dch v Kthut Thun Cng.

    Bng 2.8. Kt qu phn tch vi sinh

    STT Ch tiu phn tch n vKt qu QCVN

    09:2008/BTNMTGR41 Coliforms MPN/100ml KPH 32 E.Coli MPN/100ml KPH KPH

    (Ngun: Phiu kt qu phn tch s 11050485/KQ, Cng ty CP DV KHCNSc K Hi ng)

    Ghi ch:

    - KPH: Khng pht hin

    - V tr im ly mu nc ngm c th hin trn bn v tr lymuc nh km vo phn ph lc ca bo co.

    - QCVN 09:2008/BTNMT: QCKTQG v cht lng nc ngm

    Nhn xt:

    Tt c cc thng s phn tch u nh hn QCVN 09:2008/BTNMT. Ncngm khu vc ny c th s dng cho mc ch sinh hot.

    2.3.3. Cht lng nc mt

    Kt qu phn tch thc hin vic quan trc mu nc ngm trong khu vcd n ti v tr sau:

    Bng 2.9: V tr ly mu nc mt

    Mu V tr ly mu Ta

    NM Khe sui gn khu vc d nX = 1.303.702Y = 568.159

    Bng 2.10: Kt qu phn tch mu nc mt ti khu vc D n

    STT Ch tiu n v Kt qu

    QCVN

    08:2008/BTNMT(ct B1)1 pH - 7,65 5,5 92 DO mg/l 5,3 >= 43 TSS mg/l 35 504 COD mg/l 4,28 305 BOD5 mg/l 1,58 156 NH4+ (tnh theo N) mg/l 0,09 0,57 NO3- (tnh theo N) mg/l 0,06 10

    8 Fe mg/l 0,62 1,59 PO43- mg/l 0,03 0,310 Tng du, m mg/l Khng pht 0,1

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    hin11 Coliforms MPN/100ml 235 7.500

    (Ngun: Phiu kt qu phn tch s 210A-TN11, Cng ty TNHH dch v kthut Thun Cng).

    Ghi ch:

    - QCVN 08:2008/BTNMT QCKTQG v Cht lng nc mt

    - V tr ly mu nc mt c th hin trn bn v tr ly mu nh kmph lc

    Nhn xt: So snh kt qu phn tch vi QCVN 08:2008/BTNTM cho thyhu ht cc ch tiu u nm trong gii hn cho php.

    2.3.4. Hin trng s dng t v phng n n b

    Trong khu vc d n c t ca D n c 7 h dn. Ch d n thc hinn b theo quy nh ca Php lut. Chi ph bi thng gii phng mt bng vti nh c bao gm: Chi ph bi thng thit hi v t, cng trnh xy dng c

    bn, cy trng... theo quy nh ca tnh. Trong phm vi 200m ngoi ranh giikhu vc D n s tha thun v n b nng ry, cy trng, gi n mn vingi dn.

    2.4. Tc ng n mi trng

    2.4.1 Tc ng n mi trng khng kh

    Qu trnh xy dng c bn v khai thc - ch bin ti m gy ra nhng tcng n mi trng khng kh thng qua cc hot ng nh: o p, san imt bng, hot ng bc tng ph, khoan l mn, n mn ca qu trnh khai thc;hot ng ca t hp p - nghin - sng trong qu trnh ch bin; xc bc vvn chuyn.

    a.Tc ng do bi

    Giai on xy dng c bn: Bi pht sinh ch yu t cc qu trnh thicng xy dng cc hng mc cng trnh v qu trnh vn chuyn. Tuy nhin

    khi lng bi pht sinh l khng nhiu. Ngoi ra din tch pht tn rngngvn chuyn di, v xung quanh khu vc D n c nhiu cy xanh, nn mc tc ng ca bi l khng ng k. Tuy nhin, Ch u t s s dng xe bnti nc gim bi trong nhng ngy nng nng.

    Trong giai on hot ng: Bi tc ng n mi trng khng kh thot ng khoan l mn, n mn, ch bin, xc bc v vn chuyn.

    Bc tng ph: t ph trong khu vc m gm lp t mm, do, b ric m cao nn bi ch yu thuc b ht ln, khng pht tn ra xa. Do vy,nh hng n cng nhn trc tip lm vic l nhiu nht. Tuy nhin bi khng

    cha cc hp cht c tnh c hi v c kch thc ln, nng, t c kh nng ivo ph nang phi, t nh hng n sc khe.

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    Khoan l mn: Bi t hot ng khoan l mn gy nhim mi trngkhng kh trong phm vi hp (khu vc moong khai thc), nng thp (nh hntiu chun v sinh lao ng), ch nh hng trc tip v thng xuyn n cngnhn khoan trong sut thi gian lm vic. Tc ng ny hon ton c th kim

    sot c.N mn: Lng bi pht sinh c khi lng ln nhng c tnh cht tc

    thi, ko di khng lu, d dng pha long vi khng kh do vy khng nhhng thng xuyn n sc kho con ngi nn mc tc ng ca bi doqu trnh ny l khng ln. Tc ng ny c nhn rt kh khc phc.

    Ch bin: Bi pht sinh t qu trnh ch bin tp trung ch yu ti phunhn , my p, my nghin v u cc bng chuyn c tc ng lin tc vthng xuyn trong ngy, phm vi tc ng rng.

    Mc nh hng n dn c l khng ng k, i tng b nh hngnhiu nht v thng xuyn l cng nhn vn hnh lm vic ti khu vc chbin. Tc ng c c th gim thiu c.

    Hot ng vn chuyn: Tc ng thng xuyn v l ngun ng, cphm vi phn b rng gm khu vc khai thc, ch bin v ng vn chuyn, cth gim thiu nhng hiu qu khng cao.

    Tc ng tng hp do bi ca m trong khu vc ch yu tp trung ti khuvc m hot ng, t nh hng n khu vc xung quanh. Nu Cng ty thchin tt cng tc mi trng gim thiu bi (ti nc ng vn chuyn, trng

    cy xanh, ) th hm lng bi c th gim i nhiu ln.b. Tc ng do kh thi

    Giai on xy dng c bn

    Kh thi pht sinh trong giai on ny phn tn u trn ton din tch dn v trn tuyn ng vn chuyn, cung ng vn chuyn di nn nn nhhng l khng nhiu v km theo c cc bin php gim thiu nn cc tcng s khng ng k.

    Giai on hot ngNgun c nh: kh thi pht sinh t hot ng ca my khoan, my

    xc, my i, my o. Phm vi nh hng ca ngun ny hp, ch yu ti khuvc moong khai thc v khu ch bin. nh hng ch yu n cng nhn lmvic trc tip ti m.

    Ngun di ng: kh thi pht sinh t cc phng tin vn chuyn nguyn liu v thnh phm.. Lng kh thi pht sinh khng ln tuy nhin phmvi nh hng ca ngun ny rng gm moong khai thc, ng vn chuyn vkhu ch bin.

    Kh c pht sinh t hot ng n mn hu nh khng c do m s dngthuc n anfo v nh tng. y l 2 loi thuc n c nh gi l an ton cho

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    mi trng. Cc kh sinh ra trong qu trnh n a phn b oxy ha ngay lptc v b chuyn ha thnh cc cht t c.

    c. Tc ng do ting n

    Ting n ca cc thit b, phng tin thi cng: tc ng thng xuyn,phm vi nh hng hp, ch yu ti khu vc thi cng.

    Ting n pht sinh t hot ng khoan l mn: tc ng thng xuyn,phm vi nh hng hp, ch yu ti khu vc moong khai thc.

    Ting n do n mn: c cng m thanh ln, nhng xy ra tc thi vc d bo trc nn t nh hng n mi trng xung quanh.

    Ting n pht sinh t t hp p nghin sng: nh hng thng xuynv lin tc trong khu vc ch bin v xung quanh.

    Ting n do hot ng xc bc v vn chuyn cng gy nh hng thngxuyn, tuy nhin tc ng n mi trng khng kh mc thp.

    2.4.2 Tc ng n mi trng nc

    Nc thi sn xut

    Nc thi sn xut ti m c ngun gc t nc ngm, nc ma mangtheo cc vt liu ri vi trn b mt. Trng hp nc cn ng li moongkhai thc ta s o h thng mng thot nc cho nc chy theo dc dnra ngoi. Chiu rng v chiu su mng l 1m, chiu di mng ph thuc vo

    v tr ng nc ti mp tng.Theo c trng nhim ca nc thi trong hot ng khai thc l ch

    yu cn rn c ngun gc t bi , ngoi ra c nguy c b nhim du mkhong. V vy, s lm tng nng TSS trong ngun tip nhn. Nu h thngx l tt cn lng s khng nh hng n cht lng nc khu vc.

    Nc thi sinh hot

    Trong qu trnh khai thc, lng nc thi sinh hot pht sinh cao nht khong2,5 m3/ngy.m. Lu lng ny l nh v c x l nn khng nh hng nhiu

    n ngun nc ngm (nc thi sau khi qua b t hoi s cho t thm).Nc di t

    Trong qu trnh tho kh m lm nh hng ti s h thp mc nc ngm.Nh trong bo co nh gi tc ng mi trng trnh by bn knh mc ncngm l R = 42,8m, y l tc ng khng th trnh khi trong qu trnh khai thc, nhng sau qu trnh khai thc mc nc ngm s c khi phc

    2.4.3. Tc ng ti a hnh

    Khi hot ng khai thc c tin hnh cho n lc kt thc khai thc,

    lp t ph bc i c chiu dy trung bnh l 1,5m, chiu dy lp khai thctrung bnh l 47,0 m, do cao a hnh ca khu m s b gim xung so vi

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    b mt t nhin ban u. Tc ng ny c xem l khng th phc hi li tnhtrng ban u.

    2.4.4. Tc ng n ng thc vt, a dng sinh hc

    Khi tin hnh khai thc s ly i lp t ph lm mt t, mt ni c trca ng vt cng nh lm mt thm thc vt trong khu vc khai thc, trong qutrnh iu tra kho st cho thy trong khu vc thc hin d n khng c ngthc vt no qu him. Sau khi kt thc khai thc Cng ty s tin hnh trng cy

    ph xanh to iu kin c ni c tr cho ng vt pht trin tr li.

    2.4.5. Cc tc ng n hot ng kinh t - x hi trong vng

    a. Tch cc

    - Cung cp mt khi lng xy dng cho a bn huyn c Trng niring v cho tnh Lm ng ni chung.

    - Trong qu trnh khai thc theo cng sut thit k, d n c s dng lclng lao ng ca a phng gp phn to cng n vic lm cho ngi dn,lm gim i t l tht nghip cho a phng.

    - Ci to cc cng trnh cu ng. D n s gp phn thc y nhanh spht trin vic xy dng c s h tng khu vc vn hin ti cha pht trin.

    - Tng ngun thu cho ngn sch a phng thng qua cc khon Thu.

    b. Tiu cc

    - S tp trung ng s lng cng nhn sn xut khai thc ti d n ddn ti mu thungia cng nhn vi ngi dn a phng gy mt an ninh trtt x hi ti khu vc d n.

    - Ti cc khu vc M d xy ra cc t nn nh c bc, ru ch lm nhhng n an ninh khu vc, lm cho tnh hnh v sinh mi trng xu i.

    -Hot ng n mn, ch bin , vn chuyn lm pht sinh ra ting n,chn ng v cc cht nhim nh hng ti sc khe v ti sn ca nhngngi dn gn khu vc d n cng nh nhng ngi dn c t trong khu vcd n.

    2. 5. Cc tc ng trong giai on ng ca m

    Trong giai on ny d n tin hnh thu dn trang thit b sn xut cngnh tiu th ht s cn li trong bi cha thnh phm v tin hnh cngtc ci to phc hi mi trng.

    Cht thi pht sinh y ch yu l vt liu t qu trnh bc d vn phng,nh xng, kho vt t, trang thit b.

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    CHNG 3PHNG N CI TO, PHC HI MI TRNG

    3.1. La chn phng n ci to, phc hi mi trng3.1.1 Nh ng n i dung chnh trong qu trnh c i t o

    ph c h i mi tr ng

    Cn c iu kin thc t D n Khai thc v ch bin ti m xydng Ryolyt, cc nh hng ca qu trnh khai thc n mi trng, cng ngdn c xung quanh, cn c cu to a cht, thnh phn khong vt v chtlng mi trng ca khu vc trin khai d n, Cng ty chng ti tin hnh xydng d n ci to phc hi mi trng vi cc phng n ci to, phc hi mitrng kh thi, m bo khng xy ra cc s c mi trng, cc s c mitrng, sc khe cng ng v cc quy nh khc. Ni dung d n ci to, phchi mi trng c xy dng m bo yu cu trong Ph lc 1 ban hnh kmtheo Quyt nh s 71/2008/Q-TTg ngy 29/5/2008 ca Th tng Chnh ph,

    bao gm cc ni dung chnh sau:

    - San gt, ci to mt bng kho bi, sn cng nghip, din tch xy dng vnphng nh xung.

    - Tho d cc cng trnh ph tr phc v cho khai thc ca d n tr limt bng cho a phng.

    - Ci to khu vc moong khai thc.- Trng cy xanh.

    - Gim st cng tc thc hin ci to, phc hi mi trng.

    - Gim st cht lng mi trng xung quanh trong qu trnh thc hin dn ci to, phc hi mi trng.

    3.1.2. M t khi qut tng phng n

    3.1.2.1. Phng n 1: San lp tr li mt bng khu vc moong khai

    thc v trng cy xanhi vi phng n ny th cng vic bao gm:

    a. Ci to moong khai thc, t mu trng cy

    i vi phng n ny th cng vic bao gm:

    S dng vt liu san lp (t) lp moong khai thc. Sau trng cy xanhhoc s dng lm mt bng xy dng cc cng trnh dn dng hoc cng nghip.

    u im:

    - Khi phc c mt phn hin trng moong khai thc. Ci to phn dintch y moong khai thc bng cch t, trng cy gip ci thin mi trng vikh hu, to mi trng sng cho ng vt.

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    - Mc an ton tng i cao, t gy nguy him cho ngi v sc vt.

    - Tin hnh trng cy ly g trn ton b din tch khai thc (keo l trm, bchn,) em li hiu qu kinh t cao.

    Nhc im:

    - Cn mt khi lng t lp y h m l rt ln, c tnh khong50.000 m3. Tuy nhin, khi lng vt liu ny c tn dng t lng t bctng ph. Ngoi ra, trong qu trnh khai thc tin hnh hon th cun chiu, khaithc n u, san lp n Hon ton kh thi.

    - Khng tr li nguyn hin trng ban u. Nu trong qu trnh san lp, thchin khng tt th d xy ra trng hp st ln v c th lm thay i dng ncngm v lm nhim ngun nc ngm.

    b. Ci to khu vc bi tp kt, sn cng nghip

    Dng my mc, th cng tho d cc hng mc cng trnh xy dng baogm: vn phng, nh xng, thit b phc v khai thc tr li mt bng tngt nh lc ban u.

    Thit b s dng: Th cng

    c. Trng cy xanh

    Trng cy xanh quanh khu vc bi tp kt, bi thi, sn cng nghip, khuvc vn phng nh xng, ng vn chuyn ni b m v ton b moong khai

    thc.Thit b s dng: Th cng

    d. Tnh ton ch s phc hi t cho Phng n 1

    Ch s phc hi t cho cc Phng n c tnh theo cng thc sau:

    Ip = (Gm Gp)/Gc

    Gm: Gi tr t sau khi phc hi. Sau khi phc hi khu t s c ph xanhhon ton bng cch trng cy lu nm. D kin ti thi im thc hin ci togi t l 150.000 ng/m2. Tng din tch t ca d n l 55.000 m2 (khu vc

    khai thc v sn cng nghip).Vy Gm = 8.250.000.000 ng

    Gp: Tng chi ph phc hi t t mc ch s dng.

    Gc: Gi tr nguyn thy ca khu t trc khi m m ti thi im tnhton. Tnh theo n gi tnh Lm ng (ban hnh theo Quyt nh 48/2010/Q-UBND ca UBND tnh Lm ng cng b ngy 16/12/2010). n gi t khuvc khai thc l 45.000 ng/m2. Tng din tch s dng t l 5,5 ha (khu vckhai thc v sn cng nghip). Vy: Gc = 2.475.000.000 ng.

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    Theo phng n ny, khi khai thc s to thnh mt moong khai thc suv ch u t cn tin hnh san lp ton b din tch ny vi b dy trung bnhkhong t 1- 2 m.

    Theo tnh ton Chng 5 th tng chi ph ci to, phc hi mi trng

    theo phng n ny l Gp = 174.073.050ngTng chi ph phc hi t theo phng n 1 l:

    Vy: Ip1 = (Gm Gp)/Gc

    Ip1 = (8.250.000.000 174.073.050)/2.475.000.000 = 3,26

    3.1.2.2. Phng n 2: Ci to thnh h cha nc

    li moong khai thc dng h su t nhin, ci to thnh h nc, p bo v v trng cy thng chng st l. i vi phng n ny th cng vic bao

    gm:- Ci to moong thnh h cha nc phc v cho mc ch ti tiu.

    - Lp hng ro, bin bo.

    - To h thng thot nc cho h m.

    - Tin hnh trng cy xanh xung quanh khu vc h cha nc, mt bngsn cng nghip.

    u im:

    - H cha nc s cung cp nc cho ti tiu trong khu vc, to cnhquan cy xanh gip ci to vi kh hu.

    Nhc im:

    - Khng hon tr li cnh quan t nhin ban u cho khu vc.

    - Cng tc m bo an ton nh hng ro bo v v bin bo khng clp t th rt d xy ra tai nn nh ngi v gia sc ri xung m.

    - Rt nguy him cho cng ng c dn sng bn di khu vc thp trngkhi xy ra hin tng ma l, trn b...

    b. Ci to khu vc sn cng nghip

    Dng my mc, th cng tho d cc hng mc cng trnh xy dng baogm: vn phng, nh xng, thit b phc v khai thc tr li mt bng tngt nh lc ban u.

    Thit b s dng: Th cng

    c. Trng cy xanh

    Trng cy xanh quanh khu vc bi tp kt, sn cng nghip, khu vc vn

    phng nh xng, ng vn chuyn ni b m v mt phn moong khai thc.Thit b s dng: Th cng

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    d. Tnh ton ch s phc hi t cho Phng n 2

    Ch s phc hi t cho cc Phng n 2 c tnh theo cng thc sau:

    Ip = (Gm Gp)/Gc

    Gm: gi tr t ai sau khi phc hi, khu vc moong tr thnh h cha ncphc v ti tiu v c th kt hp du lch, cc khu vc xung quanh c th sdng xy dng cc cng trnh phc v cc mc ch trn. Theo gi th trng tithi im tnh ton l 45.000 ng/m2 i vi t ca d n, d bo gi t sau26 nm khai thc l 150.000 ng/m2. Tng din tch t ca D n l 25.412m2. Tng din tch t ca d n l 5,5 ha (khu vc khai thc v sn cngnghip).Vy Gm = 8.250.000.000ng.

    Gp: Tng chi ph phc hi t t mc ch s dng: Ch tin hnh trngtrn din tch khong 0,5ha sn cng nghip, chi ph lp t cng thot nc, bin

    bo nguy him... Chi ph c khong: 250.000.000 ng.Gc: Gi tr nguyn thy ca khu t trc khi m m ti thi im tnh

    ton. Tnh theo n gi tnh Lm ng (ban hnh theo Quyt nh 48/2010/Q-UBND ca UBND tnh Lm ng cng b ngy 16/12/2010). n gi tkhu vc khai thc l 45.000 ng/m2. Tng din tch s dng t l 5,5ha (khuvc khai thc v sn cng nghip). Vy: Gc = 2.475.000.000 ng.

    Ip2 = (Gm Gp)/Gc

    Ip2 = (8.250.000.000230.000.000)/2.475.000.000 = 3,24

    Vy I2 = 3,24Nhn xt: T 2 phng n trn cho thy Ip1 > Ip2 kh nng phc hi t ca

    phng n 1 cao hn phng n 2. Mt khc, tnh kh thi v kinh t ca phng n 1cao hn phng n 2. V vy Cng ty C Phn a c Lt la chn phng n1.

    3.2. Ni dung ci to, phc hi mi trng sau khai thc

    3.2.1. Khi lng cng vic ci to, phc hi mi trng

    a. C i t o khu v c v n phng, nh x ng, nh kho v sn cng nghi p

    Tho d cc cng trnh cng nghip v vn phng, nh xng, nh kho

    Theo thit k c s

    Din tch mt bng sn cng nghip m trn din tch khong 9.213m2 b tr vn phng m, nh CNV, xng c-in, khu ch bin nghin sng ,ng ni m din tch d kin nh sau:

    - Khu lp t H thng trm in, H thng nghin-sng vi 06 cn bngti, v bi cha thnh phm th ti a ch cn din tch khong 4.000 m2 .

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    - Khu Vn phng; nh n, nh CNV; trm cn -t... b tr pha ngoisn cng nghip ni u ni vi ng lin x. Din tch khong 500 m2.

    - Khu Xng sa cha C-in; kho vt t, kho mn b tr pha ngoi sncng nghip ni u ni vi ng lin x. Din tch khong 900 m2 trong

    bao gm din tch kho mn v hng ro bo v .

    Khi lng cn tho d

    - Tho d din tch vn phng, nh xng nh cng nhn vin khong500 m2. Trong , c tnh khi lng tng gch, nn mng cn ph d l 40m3

    - Tho d khu nh xng c in; kho vt t, kho n mn: 900 m2. Trong, c tnh khi lng nn mng tng gch cn ph d l 60 m3

    - Tho d h thng nghin sng cng sut 50 T/h vi khi lng l: 20tn- on ng vn chuyn ni b trong khu khai thc c o trn nn

    t nhin ca m. Chiu rng mt ng phi rng b tr di vn ti cho 2ln xe chy khong 300m, b rng khong 7m. Sau khi kt thc khai thc chu t s tin hnh san gt co bc b mt (khong 0,2m) tr li hin trng nnt vi khi lng c tnh khong 300m x 7m x 0,2m = 420 m3 t .

    - H thng ng giao thng t xng ch bin n ng cp phi dnsinh l mt ng t nhin trn nn t c, cht lng tng i tt. Khi kt

    thc khai thc, Ch u t khng cn phi ci to m gi nguyn hin trngphc v nhu cu i li ca ngi dn.

    - K bo v mt bng cp liu lm bng hc v b tng: ph d thcng v thu dn mt bng. Khi lng ph d: Vbk= 10m x 5m x 0,4m = 20m3.

    - Bi thi c din tch khong 5.000 m2 c trn nn t t nhin,sau khi kt thc khai thc, lng t bi thi c vn chuyn vo moongkhai thc san lp, din tch b mt bi thi tng i sch v c th trng cyc khng cn tin hnh san gt, co bc.

    Bng 3.1: Khi lng ci to mt bng sn cng nghipSTT Hng mc VT

    Khilng

    Thi gianthc hin

    1

    Tho d kt cu mi tn vn phng,nh n, nh v cc khu vc phcv sinh hot

    m2 500Khi kt thc

    khai thc

    Ph d nn gch, tng, mng vnphng, nh n, nh v cc khu vcphc v sinh hot

    m3 40

    23

    Tho d khu nh xng c in;kho vt t, kho n mn m2 900

    Ph d nn gch, tng, mng khu m3 60

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    STT Hng mc VTKhilng

    Thi gianthc hin

    nh xng c in; kho vt t, khon mn

    3 o, san gt ng vn chuyn nib m m3 420

    4 Ph d k bo v m3 20

    b. Ci to moong khai thc, san lp t trng cy

    Din tch moong khai thc sau khi kt thc c cao a hnh ti cote+1.020m, l mt h su c b mt bng rng c din tch y khong 3,42 ha.Trong qu trnh khai thc, Ch u t s tn dng khi lng t ca qutrnh bc tng ph, v t thi trong qu trnh san gt ci to mt bng sn cngnghip tin hnh san lp mt phn moong khai thc.

    Tnh ton khi lng vt liu san lp moong khai thc

    Theo kt qu kho st thc a v tnh kh thi ca phng n ci to phchi mi trng. Khi kt thc khai thc, Ch u t s tin hnh trng cy keo ltrm di y moong khai thc, Trong qu trnh khai thc, lng t bc phtng mt phn ln c Ch u t em bn hoc tn dng lm vt liu san lpcho cc cng trnh ang xy dng trn a bn thnh ph Lt do Cng tythc hin.

    Theo thit k c s, D n c xy dng bi thi ngoi vi din tch hn5.000 m2. Trong qu trnh khai thc, ngoi lng t ph c bn i th Chu t cn tch tr ti bi thi mt lng t khong 50.000 m3 phc v mcch san lp y moong sau khi kt thc khai thc.

    Tnh ton chiu cao lp t vo moong khai thc

    Trong qu trnh khai thc, Ch u t s tn dng khi lng t caqu trnh bc tng ph cha bi thi ngoi, v t thi trong qu trnh san gtci to mt bng sn cng nghip tin hnh san lp mt phn moong khaithc. D kin khi lng t ch san lp khong 1 - 2 m tng y moong

    khai thc, to mt bng thoi nghing tin hnh trng cy.Tng khi lng t phc v cho qu trnh san lp y moong sau khi

    kt thc khai thc l:

    50.000 m3 + 420 m3+ 20 m3 = 50.440 m3

    Chiu cao lp t c san lp l: 50.440 m3/34.200 m2 = 1,5 (m), mbo c s sinh trng v pht trin bnh thng ca cy keo l trm

    thun li cho qu trnh ci to phc hi sau ny. Ngay trong qu trnhkhai thc nhng nm khai thc cui cng ca m. Ch u t s tin hnh khai

    thc cun chiu, khai thc n u hon th n . V vy song song vi qutrnh khai thc vn chuyn , Cng ty cn cho tin hnh bc d vn chuynmt phn lng t bi thi vo moong khai thc nhng v tr khai

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    thc xong. Da vo nng lc vn ti v phng tin hin c ca Cng ty, ctnh khi lng t vn chuyn trong nhng nm cui cng ca m l khong40.000 m3.

    Nh vy, khi lng t ph cn li bi thi l: 10.440 m3 c Ch

    u t tin hnh vn chuyn, san lp vo giai on ci to phc hi mi trng.c. Trng cy khu vc moong, sn cng nghip, nh kho vn phng

    nh xng, bi thi

    Tin hnh trng cy keo l trm trn cc phn din tch ci to sau y:

    - Tin hnh trng cy trn phn din tch y moong khai thc csan lp t ph vi din tch c o trn bn kt thc khai thc l: 34.200m2

    - Trng cy trn din tch khu vc sn cng nghip c san i, ci tovi din tch khong 9.000 m2.

    - Din tch bi thi : 5.000 m2

    - Trng cy dc theo hai bn ng vn chuyn t m ti ng dn sinhkhong 1 km.

    Tnh ton s lng cy phi trng:

    - Vi mt 1m trng 1 cy th s lng cy phi trng hc theo ngt m ra n ng dn sinh l: 1.000 cy.

    - Tng din tch trng cy l:34.200 m2 + 9.000 m2 + 5000 m2 = 48.200 m3 (4,82 ha)

    - Chn loi cy cn trng l: cy keo l trm.

    - Cn c Quyt nh s 68/2006/Q-UBND ngy 10/11/2006 ca UBNDtnh Lm ng v vic ph duyt nh mc d ton cng trnh lm sinh ca mts loi cy trng rng trn a bn tnh Lm ng th mt cy keo cn trngtrn 1 ha l : 2.220 cy .

    - Tng s cy cn trng phc v cho ton b d n l:

    (4,82 ha x 2.220 cy ) + 1000 = 11.700 cy.

    - S lng cy xut vn t tiu chun k thut bng 120% cy trngchnh theo mt , bao gm cy trng dm v hao ht vn chuyn, bo qun.Vy tng s cy keo l trm cn trng l : 11.700 cy x 120% = 14.040 cy

    Tnh ton phng n thot nc

    Ban u, do v tr m c a hnh cao hn so vi khu vc xung quanh vch c nc ma ri trc tip vo m, lng nc ngm t, nn n chn h

    thng thot nc t nhin, t chy ra cc dng sui nh ban u.

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    Khi kt thc khai thc, mt bng khai trng rng to thnh mt moongkhai thc rng 34,2 ha nm v tr cote +1020 nhng vn cao hn b mt ahnh t nhin pha Ty Nam ca m. V vy, trong qu trnh ci to, phc himi trng vi h thng knh mng (0,5 1m, tit din hnh thang) t chy

    dc theo ng vn chuyn m bo thot nc m mt cch t nhin ra cc vtr thp trng bn ngoi hoc cc dng sui nh.

    Lp bin cnh bo nguy him vnh vin quanh moong

    phng nga ngi v gia sc tip cn moong, khi tin hnh ci to slp t cc bin cnh bo nguy him vnh vin xung quanh khu vc moong.Bin bo ghi r su v cnh bo nguy him. Vi chiu di chu vi moong l928m, cch 150 m s lp t mt bin bo. Nh vy, s bin bo cn lp t l 6ci. Cc cng vic lp t nh sau:

    + Lm bin bo b tng ct thp loi ch nht kch thc 0,5x0,6m

    + Lm ct bin bo b tng ct thp ct di 2,7 m

    + Lp t bin bo

    - Thi gian thc hin: trong qu trnh khai thc v khi kt thc khai thc,ci to phc hi mi trng.

    Khi lng lp t bin bo c tng hp nh trong bng sau:

    Bng 3.2: Khi lng lp t bin bo nguy him

    Hng mc VT Kch thc Khi lng

    Lm bin bo Ci 0,5m x 0,6m 6

    Lm ct bin bo ct 2,7m 6

    Lp t bin bo Ci 6

    d. Tng hp cng tc ci to, phc hi mi trng

    Cc cng tc ci to, phc hi mi trng trong ton b khu vc m c

    tng hp trong bng sau:Bng 3.2: Tng hp cc cng tc ci to, phc hi mi trng

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    STT Cng vic ci to, phc hi mi trng VTKhilng

    Thi gian thchin

    Ci to sn cng nghip

    1

    Tho d kt cu mi tn vn phng, nhn, nh v cc khu vc phc v sinhhot

    m2 500

    Khi kt thc khaithc

    Ph d nn gch, tng, mng vnphng, nh n, nh v cc khu vcphc v sinh hot

    m3 40

    2

    Tho d khu nh xng c in; kho vt

    t, kho n mnm2 900

    Ph d nn gch, tng, mng khu nhxng c in; kho vt t, kho n mn

    m3 60

    3o, san gt ng vn chuyn ni bm

    m3 420Khi kt thc khai

    thc

    4 Ph d k bo v m3 20Khi kt thc khai

    thc

    Ci to khu vc moong khai thc

    1 Lp bin bo ci 6

    Trong thi giankhai thc v khikt thc khaithc

    Trng keo l trm

    Trng cy keo l trm Cy 14.040Khi kt thc khai

    thc

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    3.2.2. Nhu cu my mc, thit b phc v cng tc ci to, phc hi mi trng

    Nhu cu my mc, thit b, nguyn vt liu s dng phc v cng tc cito phc hi mi trng nh trong bng sau:

    Bng 3.3: Nhu cu my mc, thit b, nguyn vt liu s dng

    STT Thit b, my mc, nguyn vt liu s dng VT S lng

    1 Keo l trm Cy 14.040

    2 My i Chic 1

    3 My mc Chic 1

    4 Xe bn phun nc Chic 1

    5 Xe vn chuyn Chic 2

    3.2.3 Cc gii php gim thiu tc ng xu, phng nga v ngph s c mi trng trong qu trnh ci to, phc hi mi trng

    a. Gim thiu bi, kh thi

    - Dn dp phn cn li trong moong khai thc nhanh chng.

    - Tiu th ht s cn li trong bi cha thnh phm.- Phun nc chng bi ti cc khu vc o p, san gt to mt bng.

    - S dng cc my mc, thit b thi cng cn nin hn s dng v s dngnhin liu c hm lng lu hunh cho php.

    - Tin hnh thi cng cun chiu, khng dn tri ko di thi gian.

    b. Gim thiu nhim mi trng nc

    - Tin hnh tho d cc cng trnh ph tr nhanh gn v thu dn sch s.

    - S dng h thng thot nc ma c trong qu trnh sn xut thugom v thot nc ma.

    c. Gim thiu nhim mi trng do cht thi rn

    - t thi, x bn pht sinh t qu trnh san gt to mt bng v x bnpht sinh t qu trnh ph d cc cng trnh ph tr. gim thiu nhim tngun ny, Cng ty chng ti s thu n v c chc nng thu gom, x l theoquy nh.

    - Cht thi nguy hi: pht sinh do hot ng bo tr cc thit b c gii

    phc v cng tc ci to, phc hi mi trng s c thu gom, hp ng vin v c chc nng x l theo quy nh.

    3.2.3.4. K hoch phng nga v ng ph s c mi trng

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    Trc khi thc hin cng tc ci to, phc hi mi trng, chng ti s tinhnh kim tra tt c cc v tr d tnh s thc hin ci to bit tnh hnh hintrng cc cng trnh s thc hin, t a ra cc bin php thch hp. Cngvic ny s do gim c diu hnh m thc hin. Sau s lp k hoch phn

    cng nhim v c th cho tng i tng v thi gian hon thnh. hn chtai nn lao ng cng nh tng hiu qu thc hin, Cng ty s giao cho b phnc chuyn mnph trch tng cng vic c th nh sau:

    - i khoan n mn: cng c b m

    - i c gii: san gt ng giao thng ni v ngoi m, ng ln xungmt bng cp liu, sn cng nghip

    - i ch bin: tho d cc cng trnh

    - i lao ngth cng: trng cy xanh

    - i bm: to h thng thot nc m

    Thnh lp ban an ton k thut chu trch nhim v cng tc an ton chungcho ton b qu trnh. i ny c trch nhim thng xuyn kim tra tin ,cng tc thc hin v vic chp hnh ni quy an ton lao ng trong qu trnhthc hin thi cng ca cng nhn.

    ng thi, t chc tp hun cho cng nhn v xy dng tnh hung tai nnxy ra cng nhn hc tp.

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    CHNG 4

    T CHC QUN L V GIM ST MI TRNG

    4.1. T chc qun lS t chc qun l, ci to, phc hi mi trng nh sau:

    B phn kim tra c trch nhim

    - Kim tra cc cng trnh trn khu m cn c tho d.

    - Kim tra din tch cn bc t v tin hnh san gt.- Kim tra moong khai thc tin hnh cng c b moong.

    - Kim tra din tch cn phi tin hnh trng cy, xc nh s lng cyphi trng trn din tch cn ci to.

    - Kim tra s hon thnh k hoch ra.

    B phn thi cng ci to phc hi mi trng c trch nhim

    Sau khi b phn thi cng kim tra xong cc hng mc cn c ci to, b

    phn thi cng tin hnh thi cng cc hng mc theo nh k hoch ra.

    49

    B phn gim st,nh gi cht lng

    cc cng trnh c phc hi ci to

    B phn thi cng cito, phc hi mi

    trng

    B phn kim tra cchng mc cn ci to,

    phc hi

    Nhn vin ph trchmi trng, an ton

    lao ng

    Gim c iu hnhm

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    B phn nh gi v gim st cht lng cng trnh c trch nhim

    B phn gim st v nh gi cht lng cng trnh tin hnh gim st bphn thi cng cc hng mc cng trnh cn c ci to v nhgi cht lngca cng trnh.

    Cui cng Cng ty C phn a c Lt tin hnh lm bo co xc nhn hon thnh cc ni dung v ci to v phc hi mi trng sau khai thc np cho c quan nh nc c thm quyn xc nhn v ph duyt.

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    Bng 4.1: Chng trnh qun l ci to, phc hi mi trng ti D n

    Hot ngThi gianthc hin

    Cht thipht sinh

    Bin php gim thiuC

    quangimst

    Cquanthchin

    Ci tomoong

    khai thc

    Cng c bmoong

    Nm kt thckhai thc m

    - Kh thi

    - Bi

    - Khng s dng phng tin, thit bqu c, pdng cc bin php thi cng hin i v ti u ha

    qu trnh thi cng.- Cc xe vn chuyn phi c giy php kim nhv thng xuyn bo tr, bo dng.

    - S dng nhin liu c hm lng lu hunh thp.

    - Phun nc lm m t.

    - UBND xLin Hip

    - S Tinguyn vMi trngtnh Lmng

    Chd n

    t xungy moong khaithc v san gt

    Trng cy ymoong khaithc, b moong

    - Cht thi rn:Bu cy, v

    bao phn,

    - Thu n v c chc nng x l theo ng quynh ca php lut.

    Ci to

    sn cngnghip

    Tho d vn

    phng, nhxung, nh kho

    Nm kt thc

    khai thc m

    - Kh thi

    - Bi- Cht thi

    rn

    - Khng s dng phng tin, thit bqu c, p

    dng cc bin php thi cng hin i v ti u haqu trnh thi cng.

    - X bn s em i ci to ng giao thng.

    St thp s bn cho n v thu mua ph liu.

    - UBND x

    Lin Hip- S Tinguyn vMi trng

    Ch

    d n

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    Hot ngThi gianthc hin

    Cht thipht sinh

    Bin php gim thiuC

    quangimst

    Cquanthchin

    tnh Lmng

    Co bc mtbng cp liu,v ng giaothng ni m

    - Kh thi- Bi

    - Khng s dng phng tin, thit b qu c, pdng cc bin php thi cng hin i v ti u haqu trnh thi cng.

    - Cc xe vn chuyn phi c giy php kim nhv thng xuyn bo tr, bo dng.

    - S dng nhin liu c hm lng lu hunh thp.

    - Phun nc lm m cc ng t ch mang i xung y moong khai thc v dc ung vn chuyn.

    San gt mtbng sn cngnghip

    Trng cy khuvc sn cngnghip

    Cht thirn: Bu cy,v bao phn,

    - Thu n v c chc nng x l theo ng quynh ca php lut.

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    4.2. Chng trnh gim st mi trng

    4.2.1. Gim st cht lng nc mt

    - V tr gim st: 01 im (ti sui trong khu vc d n) (X = 1.303.710, Y

    = 567.887).- Tn s gim st: 01 ln trong thi gian thc hin ci to, phc hi mi

    trng.

    - Cc ch tiu quan trc: pH, DO, TSS, COD, BOD 5, Coliform, Nitrate,Phosphat.

    - Tiu chun so snh: QCVN 08:2008/BTNMT ct B1.

    4.2.2. Gim st mi trng khng kh

    -V tr gim st:

    + 01 im ti khu vc ci to mooong khai thc.

    + 01 im