Hoi nghi khoa hoc ky thuat mo qudc te 2010 Cong nghiep mo tien tien vi su phat trien ben vftng O N D I N H BC? M O C A C M O T H A N L 0 T H I E N V I E T N A M TS Pustovoitova T K, TS Kagermazova S V[.]
Hoi Cong nghi khoa hoc nghiep mo tien ky thuat tien mo vi su phat qudc te - trien 2010 ben vftng O N D I N H BC? M O C A C M O T H A N L T H I E N V I E T N A M TS Pustovoitova T.K, TS Kagermazova S.V., Gurin A N Vien V N I M I , L B Nga PGS T S Phiing M a n h Dac, T S K i l u K i m True va nnk Tap doan C o n g nghiep T h a n - K h o a n g san V i e t N a m Tom tat: Tren co sd phan tich cdc dieu kien dia chat khoang sang than, xac dinh dac diem bien dang khdi dd bd md, nghien ciru ket qua quan trac dich dong bd md Viet Nam, bdi bao dua su phan loai khdi dd bd md than Viet Nam theo khd nang bi bien dang Ddng thdi cung neu len gid tri dich chuyen cho phep khdi dd bd md, phan loai nhom bd md theo cdc yeu td dia chat vd dia chat thuy van Cdc yeu td quyet dinh cdc so dd tinh toan dn djnh bd md vd cdc bien phap nang cao dd dn dinh cua chiing Key words: dn dinh bd md, giam thieu tdc ddng mdi trudng md Cac nghien curu ve on dinh ba mo than mo 16 thien Viet Nam da dugc cac chuyen gia Vien K H C N M V i e t N a m va V i e n V N I M I L B N g a thuc h i e n tir n h i e u nam qua N h u cau nghien cuu da t r a nen buc thiet k h i tir thap nien 1960 nhieu b a rao da b i b i e n dang, dac biet la Ha T u va Cpc Sau, va cang x u o n g sau p h a m v i m u c cang r o n g I o n h o n , xay tai hau het cac m o 16 thien T r o n g qua t r i n h nghien c u u bien dang b a m o da thay rang viec thiet ke m o 16 thien day da chua de cap day d u dieu k i e n dia chat anh h u n g den o n d i n h b a m o , ciing n h u chua d u bao d u n g goc doc ket thuc b a m o Cong tac n g h i e n c u u o n d i n h b a m o bao g o m n h u n g cong viec sau: nghien cuu dieu kien dia chat t h u y van, dia chat cong t r i n h khoang sang cac m o N a D u a n g , H a T u , Cgc Sau, Deo N a i , Cao San va N u i Beo; phan t i c h trang thai b a m o qua ket qua quan trac dich dong; danh gia on d i n h tirng k h u vuc b a m o cho hien trang va t u o n g lai ket thuc; dua cac bien phap dam bao o n d i n h v o i thong so t o i u u l a n nhat Cac so l i e u quan trac dich dong cho phep dieu c h i n h cac t h o n g so co l i da, xac d i n h n g u y e n nhan va dac t i n h bien dang va d u bao cac dai l u o n g bien dang t o i han Thuc te su co thuong cho thay bien dang chi xay sau nhung chu ky voi cac dau hieu dac t r u n g C o n g c u q u a n t r o n g t r u e tiep g h i n h a n t h o n g t i n b i e n dang va d u bao o n dinh la quan trac d i c h d o n g N o c u n g cho phep xac d i n h cac dai l u g n g b i e n dang t o i han v o n the h i e n sir k h o i dau g i a i doan b i e n dang t i c h cue cho cac dac t r u n g dia chat khac Kha nang de bi bien dang cua khoi da bo mo phu thuoc vao nhieu yeu to, co ban la dieu k i e n dia chat cong t r i n h , dia chat thuy van va k y thuat m o va duoc dac t r u n g boi cac dai l u g n g bien dang cho phep Khai niem "bien dang cho phep" la cac dai lugng biln dang ma dat tai no can phai ap d u n g cac b i e n phap ngan ngira phat t r i i n b i l n dang t i l p theo 531 Hoi Cong nghi nghiep khoa mo hoc tien ky thuat tien md qudc vi sic phat te - trien 2010 ben vitng Tren ca sa phan t i c h cac y e u to ciia chat, xac d i n h dac t i n h b i l n dang cac b o m o 16 thien, va ket qua quan trac d i c h dong tai cac cau true dia chat khac nhau, chiing t o i dua bang phan loai dat da b o rao than 16 t h i e n V i e t N a m theo kha nang de b i b i e n dang, chu yeu l i e n quan den the n a m n h a m thach, n h u t r o n g B a n g Goc doc n h a m thach duoc chia n h o m : 1) doc (50 - ° ) ; 2) nghieng (20 ° ) ; 3) thoai (0 - ° ) H u o n g cam l o p da t u o n g u n g v o i b o rao t r o n g m o i n h o m dupe xet la c h i n h hop ( b o t r y ) hay k h o n g c h i n h h o p ( b o vach) v o i goc n g h i e n g be mat b o m o K e t qua phan t i c h xac d i n h rang gia t r i van toe d i c h c h u y e n cho phep t u o n g doi kh6i dat da b o rao la k h o a n g tir - m m / n g d den 25 - 30 m m / n g d ; T r o n g m o i n h o m dat da nhirng gia t r i duoc t r i n h bay ro h o n N h u n g gia t r i la danh gia cho t h a i k y m u a k h o cua t h o i tiet V i e t N a m V a o mua m u a dac t r u n g ciia V i e t N a m , toe d i c h chuyen tang len rat m a n h T r o n g bang phan loai cung neu len cac dieu k i e n co ban va n g u y e n nhan xay bien dang T r o n g B a n g co dua v i d u cho cac dieu k i e n dac t r u n g ( h i n h 1,2) Tren co so B a n g co the so bo danh gia ve kha nang b i b i e n dang k h o i da b o m o rao than V i e t N a m Theo so l i e u quan trac d i c h dong, toe d i c h c h u y e n cho phep I o n nhat dat duac (~ 30 m m / n g d ) la l o p da doc nghieng k h o n g c h i n h h o p v a i be mat nghieng bo mo (canh treo) va d o n g t h a i co cac dirt gay r o n g I o n doc d i i n g c a m n g u o c chieu doc b o mo (bo bac va tay - bac D e o N a i - T u y e n quan trac d i c h dong C b v a E b , h i n h 1) Tat ca cac k h o a n g sang trir N a D u o n g da d u o c n g h i e n c i r u d e u cho thay cac d i e u kien cau tao d i a chat p h u c tap den rat p h u c tap, c u the l a san t r a n g n h a m t h a c h thay d o i manh, co n h i e u u o n nep v a d u t gay k i e n tao N h u n g k h u v u c co cau tao d i a chat y e n tinh la rat h i e m D o n g t h o i m u c anh h u o n g I o n den o n d i n h b d m d la d i e u k i e n d i a chat thuy v a n V i e c phan n h o m cac b o m d dupe tien hanh dau tien la theo dp ben dat da N h a m tang chua than c h i i y e u la da cat - set ket cac l o a i khac ve phan, co hat, x i mang gan ket Cac m d than cd the chia n h o m c h i n h theo dp ben dat da - lire d i n h ket m a u C l d n h o n 50 k g / c m va t r o n g k h o a n g - k g / c m 2 Dp ben nen ddng true (a ) va luc dinh ket mau (e ) ciia da cung va nira cung n nham t i n g chira than cd cac gia tri sau: m d H a T u va N u i Beo: a = 200-700 k g / c m , C = 502 n 170 k g / c m ; m d Coc Sau, Deo N a i - a = 250-1000 k g / c m , Co = 60-275 k g / c m ; m d Cao Son 2 n -CT„ = 670-1370 k g / c m , C = 130-400 k g / c m M d N a D u o n g cd chii yeu la da nira cung v d i 2 cac gia tri sau: a = 40-300 k g / c m , C = 10-80 k g / c m n 533 Bang Bang phan loai khoi dd tram tich bff mo than Viet Nam theo kha nang de bi bien o Dieu kit?n san trang 16p da Gdc doc ldp Hudng da, cam lop da P II 4^ II Don ta ddc, uon nep 50-90° Chinh hop Don ta nghieng, uon nep 1dm 20-50° a) Bi pha huy kien tao nhe b) Bj pha huy kien tao manh Chinh hop Khong chinh hop Toe djch chuyen cho ph6p tuong doi, mm/ngd* Chieu rong vung bien dang be mat gan bd mo Dieu kien va nguyen nhan xuat hien bien dang bd md Den 1,5-2 chilu cao bd md Do tai vung dut gay kien tao Bao ton ap luc nude ngam Cat chan ldp da bd try dang Cac md Id thien va khu vuc bd md Ba tru khoang sang Ha Tu - Bd tay (tay-bac, tuyen A, phan dudi, bien gidi ket thiic) Ba tru khoang sang Ha Tu - Bd ddng (tuyln B); Khong Bao ton ap lire nude ngam Bd nam (tuyen D); chinh hop bd tru Bd ddng-nam (tuyen C) Chinh hop Cd cac ldp giam yeu cau Coc Sau - Bd ddng bac (tuyln E); tnic bd tru Bd nam (tuyen D); ~(5-7) Khong Cat chan ldp da bd tru va Deo Nai - Bd nam (tuyen En, Cn); (10-15) chinh hop 0,8-1,2 cac mat giam yeu cau tnic Cao Son - Bd bac (tuyen X I I , XIII); chieu cao bd md kien tao Bd ddng (tuyen X I X ) ; (15-20) Nui Beo - Bd ddng (tuyln IVB); (25-30) Bd tay (tuyln VB); Ba vach khoang sang Coc Sau - Bd ddng (tuyen C); Bd tay-bac (tuyen B); Deo Nai - Bd bac (tuyln Cb); Bd tay bac, Ld Tri (tuyen Eb); Bd tru khoang sang Thoai, Chinh hop Ton tai hoac cat chan ldp Nui Beo - Bd tay (tuyln B, IVB); ngang, yeu Bd ddng (tuyen VB); gon sdng Bao ton ap luc nude ngam Coc Sau - Bd ddng bac (tuyen E); nhe ~(4-6) bd tru khoang sang Cao Son - Bd tay (tuyen X V I , X I X ) ; 0,7-1,5 Khong Do tai va ngam nude tai Bd ddng (tuyen X V I ) ; chieu cao bd md chinh hop cac dat da cd set Na Duong - Bd nam ; Bien dang tham troi (bao 0-20° Bd vach hoang sang ~(10 - 12) mdn be mat, troi ) Deo Nai - Bd tay-bac (tuysm Eb); Cao Son - Bd nam (tuy6n XIIB, X I I ) ; Na Duong - Bd bac Ghi chu: * Gid tri bien dang cho phep can phdi duac xac dinh cho tting dieu kien dia chai ky thuat cu the Bang Bang phan Nhom mo theo ben mau da; Loai da Nhom I Da tram tich cung va nira cung, ximang ran chac a > 150 kg/cm , C > 50 kg/cm ; n Cat ket, bdt ket, san ket, sdi ket vdi ximang vdi s£t, quarxit, kremnist; s6t ket siderit, da phien sdt khong bj anh hudng bdi nude loai nhom mo 16 thien Viet Nam theo cdc yeu to dia chat co ban anh hudng den on dinh bff md Phan nhom bd md theo dieu kien san trang va gdc doc ldp da (0); dac diem phuc tap cau tao dja chit (pha huy kiln tao); Y l u td dia chat thuy van Ngang, thoai, luon song; Don ta nghieng, nep 1dm long chao; Don ta ddc dung, udn P = 0-20° P = 20-50° nep; p = 50-90° Nham thach bj pha huy kien tao nhe (1-2 dut gay bd md), mot sd ldp dn djnh v l phan, chieu day, dudng phuong; cd vai hien tuong udn nep, nut ne true giao (3 he nut ne co ban) Trong bd try cd thi cd ldp giam y l u ; dut gly kien tao, via chua nude ngam ap luc khong bj thao khd Trong bd vach cd ldp da chua va sung nude, via nude ngam cd bj thao khd theo qua trinh xudng sau day md Cac khu vuc md: Batru Ha Tu - Bd Ddng-nam (tuyln C); Coc Sau - Bd Ddng-bac (tuyen E); Nui Beo - Bd Tay (tuyln B, IVB) - Bd Ddng (tuyln VB) Cao Son - Bd Tay (tuyln X V I , XIX); - Bd Ddng (tuyln X V I ) Bd vach Deo Nai - Bd Tay-bac (tuyln Eb); Cao Son - Bd Nam (tuyen XII, XIIB) Dat da bi pha hiiy kien tao, cau tnic udn nep don gian, cd ddi vun nat, pha huy dut gly ddi djch chuyen nham thach manh; nut ne tang cao (4-5 he) Trong bd md cd ddi vyn nat kiln tao, cd khe nut kien tao ldn ( b l mat ylu), phan bd bat loi tuong ung vdi bd md Trong bd tru cd the cd cac mat tiep xiic y l u , cac phan ldp yeu; khe nut kiln tao ldn; bao tdn ap luc via nude ngam Trong bd vach cd the cd via nude ngam, din din bd md bi sung nude toan phan Cac khu vuc md: Bd tru Ha Tu - bd ddng-nam (tuyln C); - Bd Nam (tuyln D); - Bd Ddng (tuyln B) Coc Sau - Bd Ddng-bac (tuyln E); - Bd Nam (tuyln D); Deo Nai - Bd Nam (tuyln En, Cn); Cao Son - Bd Bac (tuyln XIIB, XIII); - Bd Ddng (tuyln X I X ) Nui Beo - Bd Ddng (tuyen IVB) - Bd Tay (tuyln VB) Bd vach khoang sang Coc Sau - bd ddng (tuyln C); - Bd Tay-bac (tuyln B); Deo Nai - Bd Bac (tuyen Cb); - Bd Tay-blc (Ld Tri, tuyln Eb) Dat da bi pha huy kien tao manh, ciu true nuon nip phuc tap, pha huy dut gly rdng, nut ne kiln tao dai, muc dp nut ne manh; khdi da cd ciu tao khdi, cac khdi canh cd the khac han Trong khdi da bd md cd the cd nhung khoi ciu true phuc tap, mat tilp xiic y l u va pha huy kiln tao, ap lire nude ngam cao Cac khu vuc md: Ba tru Ha Tu - Bd Tay, Tay-blc (tuyen A, phan dudi gin day md, gan bien gidi k i t thuc); Nh6m I I Da tram tich nira cum| cd ben trung binh C7 = 25-150 kg/cm , C = 5-50 kg/cm , n cat ket, bot ket, san ket, soi ket, bj n£n chat, ximang gan ket y l u , ximang set; s6t kit, dat set - dat da de ngam nuoc (khi bj dd tai), de phan Muc pha huy kiln tao be\ c6 he nut ne true giao; c6 biln ddng I6p da theo chilu day va dudng phuang, theo ti'nh chat ca l i da,cd ldp da y l u - s& ket, d l truang bung va phong hda; cd anh hudng cua nude ngam Trong bd vach cd the cd: ldp tilp xuc y l u , ldp da sdt k i t y l u tru via than, d l truang bung, ngam nude va phong hda manh, cd via nude ngam ap luc Ba tru khoang sang Na Duong - Bd Nam Ba vach khoang sang Na Duong - Bd Bac on ? "ft ~* R s P H A N KY THUAT DIA CO HOC • V A D I A I V • T I N • H O C Hdi Cong nghi nghiep khoa hoc mo tien ky thuat tien mo quoc vi sit phat te - trien ben 2010 viing Cac l o p eta y e u (Co < k g / c m ) t h u o n g co d n h u n g tang tren b o rao, n h u m o t p h i n ciia ( t i t da p h i i B e T u N h u n g d i t da yeu, n h u la d o i g i a m m a sat n h a m tang chiia than, co a cac v i i n g pha h i i y dirt gay, v i d u n h u dirt gay A - A d H a T u ( C = 0,4 k g / c m ) T r o n g bang phan loai nay, m o i n h o m k h o i da b d m d l a i dupe chia l a m phan nhom theo chi sd cau tao cau t n i c - k i e n tao - theo gia t r i gdc ddc l d p da t r o n g dia tang n h u bang 1, v a cd t i n h den h u d n g cam l d p da t u o n g l i n g v d i b o m d ( k h i d u d n g p h u o n g ciia chiing gan t r i i n g v d i d u d n g p h u o n g ciia b d m o ) A n h h u d n g rat m a n h den d n d i n h b d m d V i e t N a m la cac d i e u k i e n dia chat thuy van T r o n g bang phan loai cd t r i n h bay cap loai m d I d t h i e n theo cau true dia chat thuy van, ma chiing quyet d i n h m i i c dp anh h u d n g ciia nude n g a m den dieu k i e n khai thac m d , den dp dn d i n h b d m d va cac bien phap thao k h d t u o n g i m g Cap loai ve cau t n i c dia chat t h u y v a n - Cac v i a nude n g a m b i thao k h d qua trinh khai thac m d ( b o v a c h khoang sang); Cap loai ve cau t n i c dia chat t h u y v a n - Cac v i a nude n g a m ap lire k h o n g b i m d via bdi cdng tac k h a i thac ( b d t r u khoang sang); t r o n g p h a m v i lang t r u t r u p t kha d i ton trir ap luc cao, anh hirong m a n h den dp d n d i n h b d m d , cho nen n d i chung la can phai ap lire nude ngam D i e u k i e n d j a chat kT thuat m d ciia cac phan n h o m k h d i da b o m d tren day (bang 2) dupe sir dung de quyet d i n h cac so t i n h toan d n d i n h b d m d t u o n g l i n g , dd de cap den dac d i e m bien dang va bien phap nang cao dp d n d i n h b d m d Tai lieu tham khdo Pustovoitova T K (ddng chii n h j e m ) , K K True (ddng c h i i n h j e i n ) , L V Thirc, L X Thu, T M D a n va nnk N g h i e n c i i u bien dang b o m o va cac bien phap d a m bao d n d i n h b d mo 16 thien d cac m d D e o N a i , Coc Sau, Cao Son, H a T u , N u i Beo v a N a D u o n g V i e n K H C N M d - V i e n V N I M I H a N p i - St Petersburg 2003 npaBHna odecneHemm ycTOHHHBoc™ B H H M M , 9 - c 537 OTKOCOB Ha y r o n t H b i x pa3pe3ax - Cnd, ... khu vuc md: Bd tru Ha Tu - bd ddng -nam (tuyln C); - Bd Nam (tuyln D); - Bd Ddng (tuyln B) Coc Sau - Bd Ddng-bac (tuyln E); - Bd Nam (tuyln D); Deo Nai - Bd Nam (tuyln En, Cn); Cao Son - Bd Bac... Bao ton ap lire nude ngam Bd nam (tuyen D); chinh hop bd tru Bd ddng -nam (tuyen C) Chinh hop Cd cac ldp giam yeu cau Coc Sau - Bd ddng bac (tuyln E); tnic bd tru Bd nam (tuyen D); ~(5-7) Khong... dau tien la theo dp ben dat da N h a m tang chua than c h i i y e u la da cat - set ket cac l o a i khac ve phan, co hat, x i mang gan ket Cac m d than cd the chia n h o m c h i n h theo dp ben