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Hpi nghi khoa hoc kT thudt md quoc te 2010 Cong nghiep md tien tiin vi su phdt trien ben vimg NGHIEN CUTJ KHA NANG KHAI THAC MO BINH MINH KHOAI C H A U H U N G Y E N T H U 0 C B E T H A N D O N G B A[.]
Hpi Cong nghi khoa nghiep md hoc tien kT thudt tiin md quoc vi su phdt te - trien ben 2010 vimg NGHIEN CUTJ KHA NANG KHAI THAC MO BINH MINH - KHOAI CHAU - H U N G Y E N THU0C BE T H A N DONG BANG SONG HONG PGS TS Phung Manh Dac Tap doan Cong nghiep T h a n - K h o a n g san V i e t N a m TS N g u y e n A n h T u a n V i e n K h o a hoc Cong nghe M o - T K V TS A I Iagunov Vien VNIMI (LB Nga) Tom tat: Nham dcip dug nhu cau ve than cho cdc nganh kinh te vd xudt khau, nliiing nam tdi, ngoai viec ddu tu md rdng cdng suat cdc md hien dang hoat ddng, Tap doan Cdng nghiep Than - Khoang sdn Viet Nam se tien hanh xdy dung mot sd mo than mdi dd cd md than Binh Minh - Khoai Chau - Hung Yen thudc be than Dong bang Song Hong cd dieu kien dia chat mo rdt phiic tap Bdo cdo trinh bay mot so van de can nghien ciru vd khd nang dp dung mot sd gidi phap cong nghe phii hop vdi dieu kien khai thdc tqi khu vuc I - Khai quat chung Ket qua tham so bo va nhung nghien ciru danh gia ban dau [ , 2, 3, 4] cho thay, dieu kien mo dia chat k h u vuc B i n h M i n h - K h o a i Chau - H u n g Y e n ( B i n h M i n h ) n o i rieng va be than D o n g bang Song H o n g n o i chung rat phuc tap: cac via than nam l i e n ke v d i khoang each tir m den 16 -r 20m, nham thach vach va tru la cac l o a i set ket, bot ket, sa thach co tinh cha't c a l y thay d o i pham v i l d n tir 1,0 -r 8,0 M P a T h a n h phan thach hoc ciia tdng phu la cac loai set, cat, da soi, da cuoi, co tdng chieu day den 120m, la tdng chua va d i n nude, quan he thuy van true tiep v d i song H d n g va nude be mat M u c nude ngam thuy tinh nam d u d i mat da't khoang 1,5m Tang chira than bao g d m 20 via than, dd dang chu y nha't la V va V , cd ddc 4° -f ° , V day ^ 19m, V day H- m , dd sau via d u d i mat da't tir 120 m de'n 0 m Dia hinh k h o a n g sang than la ddng rudng trdng lua va hoa mdu, cac cdng t r i n h thuy nong, ho ao, dam chua nude, he thdng dudng giao thong, d u d n g day dien cao the, k h u dan cu, trudng hoc, benh vien, cdng sd, nha cao tang v.v tong dien t i c h khoang 2.600 I I N g h i e n curu d a n h gia k h a n a n g k h a i t h a c Nghien cuu danh gia kha nang khai thac k h u m d B i n h M i n h - K h o a i Chau cho thay co the? xem xet ba phuang phap c h i n h , bao g d m : - Phuang phap k h i hda than n g a m ( K H T N ) t r o n g l o n g dat; - Phuang phap khai thac I d thien; - Phuang phap k h a i thac ham I d • Khi hod than ngam dudi long ddt la qua t r i n h dot than via lam bien ddi phan hiru ca ciia than cac loai k h i chay va k h i tdng hop hoa hoc d u d i tac dung ciia tac nhan k h i n h u d x y k h o n g k h i , hai nude ( H ) , C hoac hdn hap ciia cac k h i K h i thu dugc cd the sir dung n h u nhien lieu de san xuat dien, san xuat g d m su, vat l i e u xay dung, dot cac n d i h o i cdng nghiep hoac lam nhien l i e u cho cdng nghiep hda chat Phuang 343 Hpi Cong nghi nghiep khoa hoc md tien ki thudt tiin mo qudc vi su phdt ti trien - 2010 bin vung phap k h f hoa n g a m co u u d i e m n h u de l a i tro x i l o n g dat, tiet k i e m duoc c h i p h i khai thac than, dac biet la d o i v o i cac via than k h o k h a i thac, n h u n g viec t i m c o n g nghe hoa hop l y van c o n la van de thach thiic hien Ban chat qua t r i n h cong nghe k h i hoa than ngam g o m cac cong doan c h i n h n h u sau: K h o a n cac 16 khoan thang d i i n g , nghieng hoac ngang n g h i e n g tir tren mat dat de'n via than de t h o i nen k h o n g k h i vao dot v i a va dan hut k h i than l e n mat da't sau k h i k h i hoa Tao v i a than cac duong 16 n o i giua cac 16 k h o a n v o i (duoc goi la 16 phan Ung hoa k h f ) K h i hoa v i a than, tdc la dot than 16 phan ung hoa k h i bang phuong phap thdi nen k h o n g k h i vao v i a va hut k h i than qua cac 16 khoan Phan t i c h ket qua thir n g h i e m cong nghiep phuang phap K H T N t r o n g l o n g da't mot so nuac tren the' g i a i co the thay cho t a i t h a i d i e m hien co m o t so van de k y thuat chua giai quyet dugc m g t each triet de n h u : - V a n de n o i t h o n g cac 16 khoan de tao 16 phan irng k h i hoa than via, boi chua the k i m soat dugc qua t r i n h chay than via - Chua giai quyet: dugc van de quan l i sap da vach sau k h i than dugc k h i hoa, cung n h u van de nuac chay vao to hgp 16 k h i hoa than - Chua k i e m soat dugc qua t r i n h d i c h chuyen v i t r i cua 16 dot than via theo dien rong cung n h u theo toan bo chieu day v i a - Nay sinh cac van de tren be mat da't: phai bo t r i so l u g n g l a n cac 16 khoan tren mat dat, tieng o n ciia cac m a y nen k h i , n h i m nu6c n g a m , l a m n o n g be mat, sut l u n be mat k h i sau k h i hoa k h o n g 16n, cung n h u k h i thoat n g o a i mat da't gay n h i m khong khf, v.v - K h f hoa than n g a m l o n g dat la m o t qua t r i n h ra't phuc tap, d o i h o i phai tien hanh mot k h o i l u g n g dac k i e m soat rat I o n : l u u l u o n g nu6c, p h a n t f c h nuac, kiem soat cac pha h u y d i a chat, k i e m soat d o t h a m thau ciia v i a t h a n va da v a c h , nhiet gan k h u vuc c h a y t h a n , l u g n g k h f t r o n g k h u vuc c h a y t h a n , xac d i n h k h o i lugng than chay va c o n l a i t r o n g l o n g da't, v v - N h i e t l u g n g ciia k h i chay c o n thap - T o n that than l o n g dat 16h va k h o k i e m soat Phuong phap KHTN long ddt cd nhung uu diem nhat dinh: - Ve mat kinh te: co the dua vao k h a i thac cac k h u vuc t r u l u g n g ngoai bang can doi k h i ma k h a i thac bang cac phuang phap truyen thong khac n h u h a m 16, 16 thien- khong hieu qua D a u t u cho cong nghe K H T N thap h o n de'n 2,5 lan so v a i cac p h u a n g phap cong nghe khac, k h i cac c h i tieu k i n h te' k i thuat cao hon - ^ lan - Ve mdi trudng: k h i tien hanh k h f hoa than a sau l a n co the loai trir viec sinh va b u i qua t r i n h k h a i thac, g i a m n h i e m m o i truang K h i sir d u n g k h f de phdt dien giam n h i m k h o n g k h f san pham chay k h o n g chiia chat b u i ran va k h f C O - Ve xa hpi: K H T N la phuang phap k h a i thac than k h o n g co n g u d i t r o n g k h u vuc khai thac, loai trir cac n g u y h i e m d o i v i c o n n g u a i k h a i thac m o than Cac dieu k i e n lam viec dugc cai thien nhieu so v i k h a i thac bang cong nghe truyen thong 344 Hpi Cong nghi nghiep khoa hoc md tien kT thuat tiin mo quoc vi su phdt ti trien bin 2010 vung N h i n chung, p h u o n g phap K H T N duoc x e m la co hieu qua k i n h te nhung dieu kien nhat d i n h , dac biet la k h i K H T N sau rat I o n ( > 1500m) va nhirng k h u vuc khoang sang than ma k h i ap dung cac cong nghe truyen thong khac k h o n g co hieu qua K i n h n g h i e m cho thay, k h i d sau k h o n g I o n (300 * 500 m ) , ap d u n g K H T N k h o n g hieu qua mat dat b i pha h u y , sut l u n , dan den k h i thoat theo cac vet nut l a m g i a m hieu suat thu hoi k h i sau k h i than duoc ddt chay 16 N g o a i ra, K H T N cung k h o n g hieu qua k h i chieu day via nho h o n 1,5m va l d n hon 3,0m Tir nhung van di neu tren thay rang, d d i v d i dieu k i e n k h u m d B i n h M i n h , kha nang ap dung phuong phap cdng nghe K H T N la k h o n g cd trien v o n g nhirng l y n h u sau: - V i a than thudng la day va rat day Theo k i n h n g h i e m dieu k i e n hieu qua k h i hoa thap - Khoang sang than thuoc loai ngam nude ldn, chua sang t d van de nude chay vao via anh hudng cua nude ngam va nude mat Cac ldp ngan each nude chua duoc xac d i n h chinh xac cac tai lieu dia chat, theo k i n h nghiem d d i v d i khoang sang ngam nude, cdng nghe khong hieu qua - Phah tru luong nam d dd sau < 300 -r 500 m chu yeu tap trung d cac via day V3, V4 khong the ap dung phuong phap K H T N v i gay sut l i i n , pha h u y be mat, k h o n g k h o n g che duoc nude chay vao 16 - Sir dung phuong phap K H T N d o i h o i phai b d t r i mot he thdng I d khoan day dac tren bi mat vdi mang ludi 30 -r 100 m lam chiem dung da't tren b6 mat canh tac hoac cd cac ddi tuong can phai bao ve khac • Phuong phap khai thdc IP thien: can thiet phai bdc m o t k h d i l u o n g da't da rat l d n bao gdm toan bd l d p da't phu trdm t i c h De tu" day 120 m va cac l d p da't da thudc tram tich D u tinh he so bdc da't da len t d i tren 20 m /ta'n, ddng t h d i l a m pha v d toan bd be mat da't tren dien tich rat rdng la da't dai nong nghiep, he thdng cdng t r i n h cdng nghiep va dan dung, duong giao thong, v.v tir d d sinh cac van de m d i sinh, m d i t r u d n g , xa h d i M a t khac cac va'n d6 k y thudt n h u bao ve tdng chiia nude cd l i e n quan de'n nude song H d n g , cac van de bao ve b d m d la cac l d p nham thach m e m yeu, n g a m nude va cd l u u l u o n g nude ngam ldn, v.v d d i h d i phai cd nhirng giai phap k y thuat dac biet va c h i p h i rat ton k e m V i vay phuong phap k h a i thac I d thien k h o n g kha t h i ca ve mat k y thuat, k i n h te, bao ve m d i sinh moi trudng, xa h d i • Phuong phap khu mo Binh M i n h khai thdc ham lo: la phuong phap cd trien vong ap dung de khai thac Can cur vao dieu k i e n dia chat thuy van, dia chat cong t r i n h va n h u cah bao ve cac cong trinh, d d i tuong tren bi mat dat cd the thay hai h u d n g c h i n h de giai quyet va'n de m d mo kliai thac than d k h u vuc m d B i n h M i n h : - K h a i thac bang phuong phap ham I d ciing v d i cac g i a i phap cdng nghe bao ve toan bd cac cong t r i n h va d d i tuong tren mat da't, d a m bao canh tac n o n g nghiep b i n h thudng nhu hien tai - K h a i thac bang phuong phap ham Id v d i cac giai phap cdng nghe bao ve nhung cdng trinh chinh (nha cao tdng, benh vien, trudng hoc, dudng cao the, v v ) , thay d d i tam t h d i muc dich canh tac n o n g nghiep ( v i du chuyen trdng lua sang hoa m a u hoac cac loai khac), 345 Hpi Cong nghi nghiep khoa hoc mo tien kT thudt tien md qudc vi su phdt triin ti bin 2010 vung phuc h o i dat dai ve n g u y e n trang sau k h a i thac va t a i canh tac cac l o a i n o n g san truyen thong v.v T r o n g giai doan n g h i e n ciru ban dau co the xuat phat tir yeu cau bao ve cac cong trinh tren be mat va k h o n g l a m ngap ting mat da't D e g i a i quyet va'n de nay, can xac d i n h trudc tri so d i c h chuyen va b i e n dang cho phep d o i v d i be mat da't, d a m bao k h o n g gay h u hai, pha huy cac cdng t r i n h tren be mat, tir d d xac d i n h nguoc l a i chieu day k h a i thac cho phep va cac thdng so cdng nghe phu hop (chieu dai I d cho, tdc dd k h a i thac, phuong phap dieu khien da vach, ) D d i v d i d d n g rudng canh tac lua, hoa mau, cay an qua cd the xuat phat tir dieu k i e n dd l i i n be mat da't (dd sau munda d i c h chuyen) k h o n g duoc l d n hon dd sau muc nude ngam thuy t i n h de dam bao k h o n g gay hien tuong ngap l i n g sau k h i k h a i thac Cac t r i so dich chuyen, bien dang cho phep ddi v d i tung loai cdng trinh be mat can duoc xac dinh bang nghien ciiu quan trac dich ddng va bien dang mat dia h i n h cu the qua trinh khai thac, bang cac nghien ciiu tren m d hinh vat lieu tuong duong, phuong phap m d hinh so v.v Trong dieu kien k h u m d Binh M i n h chua cd cac cdng trinh m d , de phuc v u cho cdng tac lap thiet ke xay dung va khai thac can lira chon cac khoang sang than cd dieu kien m d dia chat tuong tir d nude ngoai de sir dung ket qua nghien cuu va kinh nghiem san cd l a m co sd tinh toan, giai quyet cac van de cdng nghe khai thac, dao Id, bao ve cac cdng trinh tren mat dat, v.v / / / - Xac dinh tri sd dich chuyen vd bien dang cho phep ddi vdi cdc cdng trinh tren mat ddt khu vuc Binh Minh dnh hudng cua khai thdc ham Id theo dieu kien tuong tu khoang sang Potmoscovie (LB Nga) Ket qua khao sat so b d cho thay tren dia h i n h k h u vuc B i n h M i n h cd cac loai cong trinh va ddng r u d n g can bao ve n h u sau: (a) N h a gach xay + tang, k i c h thudc 15 x 25m; (b) N h a gach xay tang k i c h thudc 10 x 14; hao m d n % ; (c) T u d n g rao gach xay day 20 -j- 30 c m , chieu cao de'n 1,5 m , dai de'n 40 + m ; (d) Cac toa nha benh v i e n , trudng hoc, tru sd co quan bang k h u n g be t d n g , bang gach xay + tang, k i c h thudc 30 x m ; (e) Dudng d td rai nhua hoac sdi da; ( f ) He thdng de song H d n g , dap m a n g nude thuy l o i ; (g) He thdng kenh mang thuy l o i , ket ca'u be tdng hoac k h o n g lot be tdng; (h) H d dam chiia nude, ao tha ca; ( i ) D u d n g day dien cao the K V ; ( j ) Cac cong t r i n h cdng nghiep, dan dung khac; (k) D o n g rudng canh tac lua, hoa mau, v u d n cay an qua v.v K e t qua t i n h toan bien dang cho phep d d i v d i m o t so cdng t r i n h co ban t r i n h bay tren bang D d i v d i d u d n g d td rai nhua, da sdi: k h o n g han che t r i so bien dang cho phep, qua t r i n h k h a i thac d u d i can t u sira chua thudng x u y e n ; d d i v d i d a m hd nude, ao tha ca: can dam bao dieu k i e n d d sau k h a i thac an toan: H = m ( m - chieu day k h a i thac); ddi vdi dudng dien cao the, the can dam bao : H = m ; d d i v d i cac d d i tugng khac: nghia trang, dai liet sy, m d ma rai rac tren ddng rudng : H = m a t a l a l D d i v d i d d n g r u d n g canh tac lua, hoa mau, v u d n cay an qua: day la d d i tuong nhay cam nhat, b d i l i e n quan true tiep de'n hoat ddng canh tac n o n g nghiep va d d i song ciia nong dan, v i neu k h a i thac d u d i se tao cac munda d i c h c h u y e n d dang cac v i i n g trung xudng, l d i 1dm (munda d i c h chuyen), gay ngap nude theo mua mua hoac quanh n a m C h i n h v i vay, bao ve ddng r u d n g canh tac la yeu to c h i n h de x e m xet lira c h o n cdng nghe va cac thdng sd k y thuat T r o n g t r u d n g hop t r i so d d l i i n cho phep (dd sau munda d i c h chuyen) khong duoc l d n hon chieu sau muc nude ngam thuy tinh tuc la r\< 1,5m D d i v d i vudn cay an qua can dam bao t r i so dd nghieng mat dat < 5° + ° ( i = 80 + 90 m m / m ) Hpi Cdng Bang nghi khoa nghiep md hoc tien kT thudt tiin md qudc vi su phdt te - trien Loai cong trinh xay dung Nha khung be tong, gach xay -H tang, kich thuac 15 x 25m Nha d gach xay, kich thuac 10 x 15m, hao mon 30% bin vung TT 2010 Tri so bien dang cho phep e (mm/m) 5,1 3,0 10,0 Tuong rao chan bang gach xay, day 0,2 + 0,3m, cao 1,5m, dai 40 + 50m Toa nha benh vien, truang hoc, cong sa bang khung be tong, gach xay -r tang; kich thudc 30 x 80m; hao mon 20% 0,8 De muang, mang, chieu cao < 6,0m Kenh muang thuy lai, ket ca'u be tong 4+10 1,0 2,5 H- 3,0 Kenh muang d i n nude sau < 3m, ket ca'u be tong IV - Danh gid so bp dp lun vd bien dang Id, sudung cdt chen Id bdng phuong phap thuy mat ddt trudng hop khai luc hodc bdng nen thdc ham Ket qua tinh toan cho phep xac dinh sir phan bd lun theo mat cat chinh cua munda dich c h u y l n theo ham phan b d tieu chuan S ( Z ) H i n h va la bieu dd l u n mat da't cac trudng hop sau k h a i thac 0 m , chieu dai Id c h g 150m, va dd sau k h a i thac trung binh 150m, chieu dai Id cho 80 + 120m Hinh 1- Do thi du bdo dp lun vong cua munda dich chuyen vdi chieu ddi Id chp 80 - 100m, dp sdu khai thdc trung binh 150m, ti le 115000 Tir dd thi cho thay, d dd sau khai thac 500m, dd liin cue dai bi mat da't ^ = 590mm k h i k h a i thac t a n g I d c h g , 1125m, d d n g h i e n g cua mat da't t r e n m o t v d i chieu dai munda dich chieu dai khoang km se chuyen la k h o a n g l m m / l m ; d m o t so d i e m cua m u n d a d i c h c h u y e n , d d n g h i e n g mat da't k h o a n g 2,5 m m / m , b i e n d a n g n g a n g « 2,00 m m / m dd sau k h a i thac 150m, dd l u n cue dai mat dat I n = 610 m m k h i k h a i thac tang Id chg, chieu dai munda d i c h chuyen 400 + 0 m , nghieng trung b i n h tren toan chieu dai munda dich chuyen + 3,0 m m / m , tren tirng k h u vuc cua munda dd nghieng « 5,0 m m / l m , bien dang ngang * m m / m 347 Hpi Cdng nghi nghiep khoa hoc mo tien kT thudt tien md qudc vi su phdt ti trien ben 2010 vung 5o =y =50° Hinh - Do thi du bdo lun vong cua munda dich chuyen vdi chieu ddi Id cho 150m, dp sdu khai thdc trung binh 500m; ty le 1: 5000 V • Danh gid so bp dp lun vd bien dang mat ddt trudng hop khai thdc sit dung phuong phap phd hda toan phan Phan trir l u o n g than V , V phia Tay va phia Bac khoang sang a sau k h o n g ldn, co chieu day den 19m, n a m toan bo tdng de tu, chiu anh h u d n g l d n cua nude song Hong va nude mat, k h o n g the dam bao chieu sau k h a i thac an toan H = m , cd the loai khoi t r u luong cdng nghiep dieu k i e n k h a i thac T r o n g trudng hop k h a i thac I d cho dai, chia a t ldp nghieng pha hda toan phan chieu cao k h a i thac 3,0m, chieu day l d p ngan each: 1,5m, chieu sau k h a i thac an toan cd the t i n h theo cdng thuc: H a t = 40.m K + h d p T r o n g dd: m - Chieu day k h a i thac K = 1,15 - he sd gia tang muc dd an toan trudng hop k h a i thac nhieu ldp h d p - Chieu day l d p dat phu be mat K e t qua t i n h toan cho thay: + K h i khau l d p : H = m , + K h i khau l d p H =265 m a a t - D d sau m u n d a d i c h chuyen * 11 m - D d nghieng dia h i n h pham v i munda d i c h chuyen theo hudng vuong goc phuong via « 51 m m / m - D d nghieng dia h i n h pham v i munda dich c h u y l n theo phuong via « 31,6 mm/m - Bien dang ngang cue dai theo hudng vuong gdc p h u a n g via « 39,4 m m / m - Bien dang ngang cue dai theo phuang via « 24,5 m m / m Cac t r i sd t i n h toan n h u tren deu l d n h a n nhieu lan so v d i t r i sd bien dang cho phep, tuc la sau k h i k h a i thac, tren mat da't tao cac v i i n g sut l u n chieu sau de'n 10 + 11m, 348 Hpi Cong nghi khoa nghiep hoc mo tien ki thudt tiin md quoc vi su* phdt te - trien ben 2010 vung vdi cdc vet nut den c m , l a m pha huy toan bo nha cira, cong t r i n h x a y d u n g tren mat dat, pha huy he thong thuy l g i , gay ngap ung be mat Cung k h o n g l o a i trir kha nang d d d sau l d n han 400 + 0 m , cd the k h a i thac v d i phuang phap pha hoa toan phan t r o n g I d c h g dai hoac Id chg ngan v d i chieu cao khau han che V d i tinh chat c o l y m e m yeu ciia nham thach dia tang chua than, t h i kha nang k h o n g nhieu va can dugc nghien cuu k y l u o n g han N h u vay, cd the khang d i n h , neu k h a i thac v d i phuang phap pha hoa, can d i chuyen toan bd cac cong trinh xay d u n g , thay d d i muc d i c h canh tac, d i chuyen k h u dan c u , cong sd v.v D i e u lien quan den van d6 xa h d i va c h i p h i l d n , mac d i i so b d t i n h toan k h a i thac v d i phuang phap pha hoa cd the re h a n k h a i thac v d i phuang phap chen I d t h u y luc 1,5 + 2,0 lan VI -Ket ludn: Ket qua t i n h toan so bd d d l i i n va bien dang mat dat t r u d n g hop k h a i thac ham 16 v d i phuang phap chen I d va phuang phap pha hda toan phan cd the so b d ket luan: a) D o n g rudng trdng lua v d i he thdng kenh muang thuy l g i , cac cdng trinh benh vien, trudng hgc, cdng sd, nha d la nhung ddi tugng can thiet nhat phai bao ve va quyet d i n h viec lua chgn cdng nghe khai thac va cac thdng sd k y thuat tri so bien dang cho phep cac trudng hgp n h u sau: d d i v d i he thdng kenh muong dao, dd nghieng s < m m / m , d d i v d i kenh muang ket cau be tdng, bien dang ngang < m m / m ; d d i v d i cdng trinh benh vien, trudng hgc E < m m / m , ddi v d i nha d e < mm/lm b) De han che d d l i i n be mat dat < 1,5 m va d a m bao bien dang dung va ngang nhd han t r i so g i d i han cho phep, can k h a i thac v d i phuong phap chen cat bang thuy luc, chieu day kha'u den 3,0m, chieu dai I d c h g 80 -s- 100m d d d sau k h a i thac 150m, va chieu dai I d chg 150m d d d sau k h a i thac 0 m K h i dd dd nghieng day m u n d a d i c h chuyen g i a m tir 5,2mm/m x u d n g , m m / m , bien dang ngang cua day munda d i c h chuyen g i a m tir m m / m xudng , m m / m , d d liin b& mat dia h i n h (dd sau munda d i c h chuyen) cue dai 0 m m c) D d i v d i cac toa nha d cao tang, benh vien, trudng hgc, cong sd can de l a i cac t r u than bao ve; d d i v d i he thdng kenh, m u o n g , mang nude, v d i ket cau be tdng cd the ap dung cac bien phap k y thuat gia c d ket cau k h i xay dung, hoac t r u d n g hgp can thiet t h i de lai tru bao ve d) De dap ling dieu k i e n dd l i i n dia h i n h k h o n g dugc l d n h o n d d sau muc nude ngam thuy tinh, cd the tien hanh k h a i thac ldp, v d i tdng chieu day 6,0m bang phuang phap chen 16 thuy luc, k h i do l i i n cue dai la 0 m m , n h d hon dd sau d u d i mat dat ciia muc nude ngam thuy tinh la 0 m m va cd the k h a i thac dugc khoang 90 + 110 trieu tan than d k h u vuc Binh M i n h V d i nghien cuu c h i tiet ty m i han, d m o t sd k h u vuc cd the x e m xet khau + ldp v d i tdng chieu day k h a i thac den -H 10m hoac l d n han, cac so l i e u can dugc chinh xac hda d giai doan nghien cuu tiep theo e) De cd co sd lap quy hoach k h a i thac be than ddng bang song H d n g can thiet trien khai xay dung va k h a i thac mot m d thuc n g h i e m n h a m xac d i n h cdng nghe dao I d , khau than va danh gia sir anh hudng cua cac dieu k i e n dia chat edgn t r i n h , dia chat thuy van va muc dd d i c h chuyen bien dang be mat da't k h a i thac gay nen f ) De cd d u c a sd lap d u an dau t u xay dung m d thuc n g h i e m , can thiet khao sat bd sung dieu k i e n dia chat t h u y van, dia chat cdng t r i n h muc -300 len I d via - day la k h u vuc md dugc cac I d k h o a n tham xac d i n h v d i dd t i n cay cao, dieu k i e n tai nguyen tot Cac n h i e m v u khao sat bd sung n h u sau: 349 Hpi Cong nghi nghiep khoa hoc md tien kT thudt tien md qudc vi su phdt ti trien - 2010 ben virng + Xac d i n h g i d i han d u d i va be day tang chua nuac tiep giap be mat; + C h i n h xac hoa cac t h o n g so tham tang Neogen; + C h i n h xac hoa su t h a m x u y e n tir tang D e t d x u o n g tang N e o g e n ; + C h i n h xac hoa t i n h chat co l y da vach t r u cac via than; - Phuang an khao sat t h a m bo sung can thiet d o i v d i k h u vuc m o d muc sau hon (300 4- 0 m ) , n a i c d dieu k i e n k h a i thac tuong d d i d a n gian h a n n h u n g dd t i n cay ve tai nguyen thap m a n g l u d i I d khoan thua, can chuan xac hda cac d i e u k i e n dia chat va trir lugng nham muc tieu m d k h u m d thuc n g h i e m d muc sau va x e m xet k h a nang khai thac ham Id v d i p h u a n g phap pha hda toan phan hoac phuang phap chen I d tirng phan N h i e m v u ciia phuang an n h u sau: + N g h i e n ciru c h i tiet dac d i e m dia chat thuy van, m d i l i e n he thuy luc theo hudng thang dung, t i n h each nude va chua nude cua cac tang khac va xac d i n h l d p ngan each nude cd dia tang t r a m t i c h Neogen va tien hanh danh gia d i n h l u g n g kha nang ngan nude ciia n d + Xac d i n h bd sung dac d i e m cau tao da vach ciia cac v i a than, t i n h toan phan tich nut va bien dang da vach c d the xuat hien sau k h i k h a i thac l a m tai l i e u c o sd de d u tinh lugng nude chay vao m d va d u doan bien dang sut l u n ciia be mat + Thiet lap cac t r a m quan trac ddng thai nude ngam ciia cac tang chua nude khac va theo d d i sir l i e n he giua chung + Quy hoach phat trien khai thac va tinh toan m d phong lugng nude thudng xuyen chay vao m d , bao g d m lugng nude chay vao m d l d n nhat va quy luat thay d d i theo tirng thai k y + Xac d i n h cac dirt gay c d bien dd d i c h chuyen l d n h a n m de c d ca sd b d t r i Id chg ciia k h u k h a i thac ban dau, lua chgn phuang phap khai thac va de t i n h toan ngan ngira buc nude vao m d + Xac d i n h d d sau ciia tdng chua nude tiep giap be mat + X a c d i n h cac t h d n g so: nhiet dd cua da't da, nude n g a m d tang sau, d d chua k h i tir nhien, t i n h t u chay ciia than, t i n h kha tuyen ciia than, c h i l u day, ca'u tao, m u c cao ciia vach tru via cac via than, t i n h chat ciia than, v.v + T i n h toan t r u l u g n g , tai nguyen than pham v i t h a m b d sung./ Tdi lieu tham khdo - Phiing Manh Dac va nnk "Bao cao tdng ket khoa hgc va kT thuat de tai "Nghien cuu cac giai phap khoa hgc va cong nghe nham huy dong t6ng hop tai nguyen phuc vu chien luge phat triin b i n vung khai thac va sir dung than d Viet Nam" Vien Khoa hgc Cong nghe M o Ha Noi thang 3/2006 Bao cao dia chat ket qua khao sat, tim kiem, tham than Dong bang Song Hong (viing Binh Minh- Khoai Chau - Hung Yen) Tong Cong ty Than Viet Nam - 2003 Mot sd van d l nghien cuu khai thac than khu virc Binh Minh - Khoai Chau - Hung Yen thuoc b l than ddng bang Song Hong TS Phung Manh Dac, TS N g u y l n Van Chi -Thdng tin K H C N Mo so 1/2004 Bao cao ket qua nghien cuu so bo d i l u kien khai thac khu vuc Binh M i n h - Khoai Chau Hung Yen thuoc b l than Ddng bang Song Hong TS Phiing Manh Ddc, TS K i l u K i m True, TS N g u y l n Van Chi, Mironov ( V N I M I ) ; Iagunov ( V N I M I ) - Bao cao tong ket, Vien K H C N M o 2003 - 2004 350 ... chay ciia than, t i n h kha tuyen ciia than, c h i l u day, ca''u tao, m u c cao ciia vach tru via cac via than, t i n h chat ciia than, v.v + T i n h toan t r u l u g n g , tai nguyen than pham... i n vung khai thac va sir dung than d Viet Nam" Vien Khoa hgc Cong nghe M o Ha Noi thang 3/2006 Bao cao dia chat ket qua khao sat, tim kiem, tham than Dong bang Song Hong (viing Binh Minh- Khoai... Minh- Khoai Chau - Hung Yen) Tong Cong ty Than Viet Nam - 2003 Mot sd van d l nghien cuu khai thac than khu virc Binh Minh - Khoai Chau - Hung Yen thuoc b l than ddng bang Song Hong TS Phung Manh