CONG SUAT KHAI THAC 2,0 TRIEU TAN/NAM

KHOA HOC VA

C O N G N G H I

MO

MO VIA K H O A N G S A N G THAN H A M LO NUI BEO D A P UING

CONG SUAT KHAI T H A C 2,0 TRIEU T A N / N A M

TS. DAG DANH PHl/pNG, KS. N G U Y I N V A N KIEN Vien Khoa hoc Cdng nghe Mo-Vinacomin

^ \ I quyet djnh xay dyng mot mo ham Id mdi Nam b phfa Tay khai tri/dng mo Nui Beo la khai

^ I ^ J c o n g tac dau tien la Md via Khoang sang, trydng mo than Ha Lam hien dang khai thac ham Id

^ ^ ^ T a m quan trong cua cong tac md via la: mifc-150-fLV, dydc khai thdng bang gieng nghieng quyet djnh cong suat mo va tuo'i tho mo, cac cdng va dang xay diTng ed ban tang khai thac -300 dydc nghe khai thac mo, cdng nghe md Id ehua'n bj, sd khai thdng bang gieng ddng, dy kien khai thac vao do thong gid, thoat nyde, bd tri mat bang san cdng nam 2013 vdi cdng suat 2,4 trieu tan/nam. Gieng nghiep mo, van tai trong mo, tren mat mo va mot sd ddng ehfnh dao td mat bang mdc +70 (phfa Tay yeu td ky thuat khac... Bae) xudng mdc -345, ed dydng kfnh 5,0 m de van

1. Cac phuong an truyen thdng de' md via f'^^^!!: ^ ' ^ P ^ ^^""^ phu dao td m?t bang rnde H-70 cho md than khai thac ham Id ^P^!!, ^ f V Bae) xuong rnUc -325, co cJ^Tdng kmh 6,5

m de van tai ngydi, thiet bj, vat lieu, dat da thai va Md via bang 16 bang, gieng nghieng, gieng cung ca'p gid sach cho mo. Gieng ddng thong gid:

ddng, ket hop (Id bang+gieng nghieng, 16 bang dao td mat bang mdc +28 (phfa Tay) xudng mdc - +gieng ddng...). Moi phUdng an md via deu ed Uu 325, ed dydng kfnh 5,0 m de thoat gid ban. Tai mdc nhudc diem rieng. Oe lya ebon phUdng an md via -300 dao he thdng san ga, ham tram va cac dydng hap ly phai xuat phat td dieu kien dja cha't, dieu Id xuyen via van tai va thong gid ehfnh de khai kien ky thuat-mo.... Do do khi md via phai de thdng cho khai trydng.

xuat mot sd phydng an md via va so sanh chi c. Md via ham Id mo Nui Beo lien quan tdi dii tieu kinh te-ky thuat t d do lya chon phydng an an md via cua mo Ha Lam

md via hdp ly nha't. Nham lya chon phydng an khai thong hdp ly - , . . ^^ , i ' L ' U-' tren cd sd xem xet khai thac tdng the khoang sang 2. Lya chon phudng an m d via cho mo ham ., i i - i -- - * u - * ' * T u ' - ? j

° " ' ^ ° he thdng dydng 16 khai thdng hien cd cua mo Ha 2.1. Hien trang cua mo 16 thien Nui Beo vi Lam de khai thdng cho ca mo Nui Beo. Cdng suat mo Ha Lam lien quan tdi van demdvia mo ham khai thac khi khai thdng chung mo Nui Beo vdi mo Id Nui Beo Ha Lam la 4,4 trieu ta'n/nam.

a. Hien trang khai thac mo Id thien Nui Beo Qua tfnh toan k i l m tra cho thay he thdng van Mo than Nui Beo thuoc khoang sang than Ha tai, thdng gid qua cac gieng khai thdng hien c6 cOa Lam-Ha Long, dang 6\J(ic Cong ty Co phan than mo Ha Lam chi dap dng tdi da cdng sua't khai thac Nui Beo-Vinacomin quan ly, bao ve va td ehde la 3,4 trieu tan/nam. Ket qua tfnh toan tha'y rang, de tham do, khai thac. Hien nay, mo dang td ehde khai xay dyng chung thanh mot mo khai thac vdi cdng thac bang phydng phap 16 thien tai via 14 va canh sua't 4,4 trieu tan/nam phai xay dyng mdi 01 gieng Tay via 11, via 13 vdi cdng sua't khai thac 4,6 trieu ddng van tai than chung cho hai mo va 01 gieng tan/nam. Dy kien khai trydng via 14 se ket thuc ddng thoat gid cho mo Nui Beo, cac gieng ehfnh, khai thac vao nam 2012 d day la mdc -135 va khai phu ciia mo Ha Lam se lam nhiem vu cung ca'p gid tru'dng Canh Tay via 11, via 13 se ket thuc khai sach cho hai md. Mat khac do khoang each td thac vao nam 2015 b day la mdc -135. Sau khi ket gieng ddng md Ha Lam den he thdng van tai chi'nh thuc khai thac 16 thien, phan tai nguyen cdn lai se ben khai trifdng Nui Beo la 5,4 km va den cac 16 dydc td ehde khai thac bang phu'ong phap ham 16 chd khai thac la 7+9 km se gay kho khan cho cdng vdi cdng suat 2,0 trieu tan/nam. tac td ehde san xuat cung nhir cdng tac thdng gid b. Hien trang khai thac mo Hi Lam cho dao Id xay dyng cd ban se het sdc kho khan.

CdNG NGHIEP MO SO 2 - 2 0 1 2

CNM KHOA HOC VA CONG NGHE MO

Theo kinh nghiem tr§n thd gidi khoing each td gi^ng ddng ehfnh dao td mdc +35 xudng mdc -410, co den khu khai thac <5 km la hdp ly. Do vay, khai thdng di/dng kfnh 6,0 m, trang bj thung skip van tai than, cho mo ham 16 Nui Beo phai ddc lap vdi md Ha Lim. chieu sau gi^ng 445 m. Gidng ddng phu cung tii

d. Trur lupng cua md him Id Nui Bio vi djnh mat blng mdc +35 xudng mdc -370, gi^ng ^ hudng phuong phip diSu khiin di vich dydng kfnh 6,0 m, trang bj thung cOi van chuy|

Tai nguyen huy ddng khai thac him Id gim cac cdng nhSn, d^t da thii, thidt bi, vat lidu eh6ng|6, via 11, 10, 9, 7 va 6 vdi tdng trd lL/<?ng dja chit la v$t lilu ch6n Id, chi4u sdu gilng 405 m. ^ 78,5 trieu tin, ti/dng dng trOf li/dng cdng nghilp la Sau khi dao xong cac gidng tien hanh dao h§

51,1 tri§u tan, trong dd khu vifc khai thac sd dung thdng sdn ga, h i m tram cCia gidng d mdc -140 va phydng phap dieu khien da vach blng pha hoi mdc -350 d i m b i o nang lyc van t l i than cung nhu toan phan (phia Tay va Tay Bic khai trifdng) la van t l i ngi/di, d i t d l thai, thidt bj, vat li§u qua 30,78 trieu tan. khu vi/e khai thac sd dung phifdng gilng. Td s i n ga mdc -140 va -350 tiln hanhd^o phap dieu khien da vach blng ch6n Id (phfa Ddng cac difdng Id xuySn via van t l i v l thdng gid chi'nti va Ddng Nam) d l bao v§ cac cdng trinh trSn b i d l khai thdng cho to^n bd khai tri/dng. Khai thdng mat la 20,32 trieu tan. cho phln trOf li/dng di/di mdc -350 cOa via 7 va via

2.2. Luti chon phudng in mdvia 6 blng clch dao cac Id ngam di trong than kit hdp Van de md via cho md ham Id Nui Bio phli dap trong 6k.

dng difdc cac yeu cau sau day: • Phifdng an 2: Khai tn/dng di/oc khai th6ng

•:• Cdng tac md via va dao Id chuan bj cd ban cua blng 02 gilng nghidng td vj trf mat blng phfa TSy mo ham Id Nui Beo ft anh hi/dng nhat den hiln trang Nam khai tri/dng, gili phap ky thuat cua phi/dngan khai thac Id thien, khai thac ham 16 tang -156-i-LV va nhi/ sau:

xay dyng cd ban tang -300 cua mo Ha Lam. Td mat blng mdc +35 md cda Id cap gieng

• Tan dung tdi da cac cdng trinh tren mat blng va nghieng ehfnh va gieng nghieng phu. Gieng cac dydng 16 khai thdng ehfnh cua tang tren cung nhi/ nghi§ng dao theo hydng Tay Ddng vdi phi/dng vi dydng 16 khai thdng tang -300 mo Ha Lam. p=88° xudng mdc -350.

•:• Thdi gian xay dyng cd ban nhanh nhat. Gieng nghi§ng ehfnh van tai than cd cot cao

• Vd'n dau ty xay dyng cd ban nho nhat. +35H-380, gdc nghieng a=21°. chieu dai L=1.158

• Trd lydng than de lai try b bao ve va khai thac m, dien tfch tiet dien sd dung 28.0 m^ trang bi bang Id thien khdng khai thac dydc do bd tri gieng va mat tai ddc de van tai than. Tai chin gieng xay dimg

bang san cdng nghiep la nho nhat. bun ke rdt than mdc -350-^ -380. I

• Try lydng than de bao ve cac dydng Id khai Gieng nghieng phu cd cdt cao +35^350„|6c thdng va cac cdng trinh tren mat bang san cdng nghieng a=25°. chieu dai L=940 m. dien tfch liet nghiep la nho nhat. dien sd dung 28,0 m^ trang bi mdnoray de van lai

• cac cdng trinh xay dyng tren mat bang va cdng nhan len xudng Id. thiet bi. vat lieu ch^glb dydng Id khai thdng di/dc bd tri vao khu vyc dat da v l true tai de vSn tai dat da thai.

on djnh, tranh khu vyc da khai thac. Lien he giufa hai gieng blng cac Id noi lien lac

•:• Khoang each gida gieng va khu khai thac la nho each nhau 300 m, dam bao cho viec thdng gio, an nhat nham giam chi phf van tai va thdng gid md. toan trong qua trinh thi cdng va san xuat.

• Khdi lydng san gat mat bang ft anh hi/dng Sau khi dao xong cac gieng tien hanh dao he den dan cy va mdi trydng xung quanh. thdng san ga, ham tram cCIa gieng d mdc -140 va Td nhdng yeu cau tren Md via cho md ham 16 mdc -350 d i m b i o nang lyc van tai than cuns Nui Beo du'de nghien edu de xuat 2 phifdng an nhif van t l i ngUdi. dcit da thai, thiet bj. vat liei md via sau dd so sanh cac chi tieu kinh ke ky qua gilng. Td s i n ga mdc -140 v l -350 tien hani thuat cCia tdng phi/dng an va lya chon phifdng an dao cac difdng Id xuydn via van tai va thdng git tdi yu nhat: ehfnh de khai thdng cho toan bd khai tn/dng. Kha

• Phifdng an 1: Md via md ham Id Nui Beo thdng cho phln trOf lifdng difdi mdc -350 cOa via i dydc thyc hien bang cap gieng ddng tai mat bang va via 6 blng each dao cac Id ngam di troni san cdng nghiep +35 d phfa Nam khai trUdng, canh than kdt hdp trong da.

mat bang san cdng nghiep +35 cCia md Id thien Nui Td bang so sanh cac chi tieu kinh te-k9 thu?

Beo hien nay. Do cao khai thac td Id via den day cOa hai phifdng an trdn lya chon phydng an 11^

tang than (mdc -500 via 6) difdc chia thlnh cac phifdng an tdi ifu nhat de md via cho md ham I mdc thdng gid ehfnh -140; mdc van tai ehfnh -350 Nui Beo. Tdng hdp khdi lifdng dydng 16 xay dOn va khau vet difdi -350, ra than tai mdc -350. Gieng cd bin difdc the hien b Bang 2.

CdNG NGHIEP MO sd 2 - 2 0 1 2

KHOA HOC VA

C O N G N G H £ M 6

CNM

Bang 1. Bang so sanh cac chi tieu kinh te-ky thuat cua hai phuong an md via.

IT 1 2 3 4 5 6 7 8 9 10

Ten chl tieu Phifdng an khai thong

Khoi lydng san gat mat bang SCN (dao, dap) Trd lydng than de lai lam tru bao ve mSt bang san cong nghiep, gieng, san ga

Chieu dai gieng van tai

Tdng chieu dai met 16 khai thong

Cung do van tai than td mat bang san c6ng nghiep +45 ra nha may tuyen Ha Lam

Chieu dai tuyen van tai trong 16 va gieng khai trUdng Nui Beo ve MBSCN

Thdi gian xay dung cd ban mo Nui Beo Kha nang dau noi cac mang ky thuat mat bang: dien, nuoc, giao thong...

Tinh on dinh cac cong trinh xay dyng tren mat bang

Ddn vi

m^

tan m m m m nam

Khdi Vj tri so 3 mat bang

+35 (phia islam) Gieng ddng

260.200 1.934.251

445 23.625

7.002 955

4,0 Thuan Idi

On dinh do xay dyng tren nen dat gdc

Udng

Vj tri so 4 mSt bang +35 (phia Tay Nam)

Gieng nghieng 684.000 5.706.699

1.158 24.662

8.300 1.658 5,0 Thuan Idi Sd dung dien tich bai thai trong khai trUdng via 14 canh Tay mo Nui Beo 3,0 ha

3 : 3 :

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'•^,6UHKE1WANTHAH-M0---310

.0 v*ic«ry^Ut 350,a'lTiM°100m,

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H. 1. Sa do difdng Id khai thdng mCrc -350.

CONG NGHIEP MO SO 2 - 2 0 1 2

KHOA HQC VA CONG

N G H C M 6

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H.2. M^f cdf Qua fyy^n v^n f^/, f/)dng gid chinh.

Bdng 2.

T T A 1 2 3 4 5 6 B 1 2 3 4 5 6 B

T§n difdng Id Difdng Id khai thdng

Gieng ddng ehfnh van tai than Gieng ddng phu van tai vat lieu san ga va ham tram mdc -140 san ga va ham tram mdc -350 Dydng Id khai thdng mdc -140 Dudng Id khai thdng mdc -350 Difdng Id chuan bi

Ld chd 11101 Ld chd 11102 Ld chd 21102 Ld chd 31101 Ld chd 41101 Ld chd 41102 Tdng cdng

•" "Chieu d

\Mda 445 405 1.032 2.147 1.620 1.150 465

55 0 0 55 300

55 7.264

l i Id, m Ld than

0 0 0 0 40

0 9.800

1.975 1.040 2.105 1.615 2.025

1.040 ...4 . 9 . 8 4 f i ^ i

•

Th^ tich di/dng Id. m^ ' Ldda

19.481 17.660 20.384 42.170 32.730 27.191 6.639

605 0 0 974 4.455 y. •. 605i-;i -

mAm^m:v::i

Ldthan

^ 1 ° J _i

0 716

0 131.334 J

24.465 1 11.518 32.502 &

26.757 "^

24.587 11.505 _ 132.050 3. Ket luan

Phydng an md via khoang sang than ham Id Nui Beo bang cap gieng ddng la hdp ly nhat vi:

• Anh hydng den hien trang khai thac Id thien, khai thac ham Id tang -150+LV va tien do xay dyng cd ban tang -300 cCia md Ha Lam la nho nhat

• Khdi lUdng san gat mat bang ft Inh hifdng den dan cif, mdi tn/dng xung quanh.

• Cac gieng dydc md trong tang da't da tifdng ddi on djnh

• Khi dy an dau tif khai thac ham Id md than Nui Beo di vao boat dong se mang lai hieu qua kinh te cao vdi cac chl tieu: tdng mdc dau tif « 5.301,47 ty' dong; gia trj hien tai thyc NPV«317.961^ dong; t^ Id lai

noi tai IRR=16,90 %; thdi gian hoan von 7,98 nam Khi md di vlo boat ddng se gdp phan giam thieu 6 nhiem mdi trudng d thanh phd Ha Long so vdi mo khai thac Id thien. tiep tuc duy tri phat trien va dam bao # lam on djnh cho can t)d cdng nhan md than Nui Beo sau khi ket thuc khai thic Id thien.D

> . , -i TAI LIEU THAM KHAO

1. Tran VSn Huynh va nnk. Md via va khai thac ham Id khoang sang dang via. NXB Giao thons Van tai. Ha Noi. 2002.

2. Le Nhu Hung. Thiet ke md ham Id. NXB Giac thdng Van tai. Ha Noi. 2008.

(Xem tiep trang 10 CONG NGHIEP MO SO 2 - 2 0 1 2