Hdi nghi khoa hoc ki thuat md quoc te 2010 Cdng nghiep md tien tiin vi su phat trien ben viing MO PHONG SO HOA GlTCfNG KHAI THAC TAI MO SI HE ThS Li Zhong Xiao Truong Dai hoc Cong nghe L i e u N i n h[.]
Hdi Cdng nghi nghiep khoa hoc md tien ki thuat tiin md quoc vi su phat te - trien ben 2010 viing MO PHONG SO HOA GlTCfNG KHAI THAC TAI MO SI HE ThS Li Zhong Xiao T r u o n g D a i hoc C o n g nghe L i e u N i n h , T r u n g Quoc Tdm tat: Hien nay, mo than Si He dang tien hanh khai thdc thao cdc khodnh song song, khong gian dudng Id cai chinh tuong doi nho nen dan den hien tuong chong icng suat, gay nguy hiem van hanh thiet bi khai thdc Phan tich cdc thdng so lien quan den may lien hop khai thdc, guong dao de giam bdt hien tupng chong inig suat, tdi uu hda so dao Id, tit dd giam bdt hien tuong phut khi, dam bao an toan khai thdc md Id ndi dung chinh bai bao Thir nghiem cdc dac tinh co ly cua mau than Phan t i c h mang t i n h l y thuyet va m o p h o n g thuc n g h i e m da c h u n g m i n h rang su phut la ap luc cua dat da, k h i metan cung n h u cac dac t i n h c o l y ciia than K h a i thac va dao 16 tai k h u v u c g u o n g co u n g suat cue bo co k h a nang gia tang sir phut k h i De ngan ngira kha nang gay phut k h i , chung ta co the tien hanh k i e m tra cac t h o n g so ciia dat da thong qua cac p h u o n g phap thir n g h i e m va phan t i c h cac t h o n g so vat l y cua m a u than va dat da N h o sir d u n g phan m e m F L A C , dua tren cac t h o n g so tir cac m a u than lay tir d u o n g 16, cac thong so vat l y cua cac m a u da, tien hanh m o p h o n g k h u v u c tap t r u n g u n g suat de lam giam m o t each h i e u qua u n g suat tap t r u n g , thiet lap m o t c o so dang t i n cay 1.1 Lua chon vi tri lay cdc mau than De tien hanh thir n g h i e m cac dac t i n h co l y , da tien hanh t h u thap cac m a u than tir guong 16 doc 23053 v a g u o n g 16 khai thac bang p h u o n g phap c o g i o i hoa 2306 T a i m o i v i tri thuoc via g i u a va v i a p h i a d u o i tien hanh lay ba mau 1.2 Xac dinh cdc dac tinh co hoc cua mau than Cac dac t i n h c o hoc can xac djnh bao g o m ben n e n v a ben keo mot chieu cua than, modul dan h o i , he so Poisson, c h i so nang l u o n g v a dap, ben cat, lire dinh ket, goc n o i m a sat cua than va t a m c h i t i e u khac C h i so ben nen d o n true duoc xac d i n h theo cua tieu than chuan MT44-87, xac d i n h b a n g m a y thir nghiem co hoc ( h i n h 1) Cac c h i so ve ben cat cua than, ben nen va ben keo d o n true cua than, c u n g n h u lire d i n h ket va goc n o i m a sat cua than 409 Hdi Cong nghi khoa nghiep mo hoc kT thuat tien tien mo qudc vi sir phat ti trien - 2010 bin vung dugc t r i n h bay tren b a n g l Bang Cdc ddc tinh caly cua than Trong luong rieng (kg/m ) Dung (kgtoi) Do am (%) Do rong (%) Chi so rong (%) Do ben keo (MPa) Mo dun dan hoi (MPa) He so Poisson 1544 1480 4,81 8,54 9,34 1,98 16,41 21869 t Tdng quan \ ve dia GO Luc dinh ket (MPa ) Goc noi ma sat (°) He so kien c6 (f) Chi so nang luong va dap (W) 0,23 2,66 49 1,6 r chat (1) Phan t i c h da v a c h v i a than C h i e u day v i a tir 4,4 den 8,86m, t r u n g b i n h la 6,42m, so l o p kep tir den lop (2) Cac dac t i n h c o l y ciia than T h a n t r o n g v i a la loai than antraxit, co tro t r u n g b i n h , l u u h u y n h thap Cac dac tinh co l y ciia v a c h va t r u d u g c neu t r o n g bang Bang Cdc tinh chat ca ly cua dd vach tqi via than T i n h chat Thach hoc T y trgng bieu k i e n D o ben nen Khoan K i e m t r a lan Vach Vach (t/m ) (MPa) (MPa) Tru kit Set cat kit D o n huong 2,75 2,76 cat Bao hoa 20 25,4 Bdt ket 2,9 Kho 20,4 15,6 D o n huong 30,7 20,3 4,98 D o ben cat ( M p a ) 45° 1,73 2.93 4.46 L u c d i n h kk 55° 5,75 4,70 4,93 Goc noi ma sat 65° 40°21 42°36" 41°36 He so Poisson 45° 41,2 41,2 0.27 U n g suat phap ( M P a ) 45° 10,0 11,9 23,25 (MPa) U n g suat cat ( M P a ) Tru • Bdt ket 2,76 He so m e m D o ben keo K i e m tra lan Set J so 65° 3,4 ! 3,4 0,16 15,37 (3) Phay pha va uon nep V e phia dong va tay cua m o co n h u n g nep l o i va lorn tao r m u n g uon nep va phay pha chit yeu N g o a i dia h i n h c i u tao len x u o n g rat phirc tap 410 Hoi nghi Cong nghiep r r khoa hoc kT thuat md quoc te - 2010 md tien tiin vi su phat trien ben vung (4) Chieu sau khai thac Chieu sau k h a i thac v i a than s6 tir mire + d i n + 680 (5) Cac dac t i n h ciia da vach - V a c h c o ban co cau tao dang bot ket, chieu day dat 3,71 m Dac d i e m thach hoc: mau xam, dang hat, c h u y e u duoc tao tir thach anh, fenspat, co n h u n g khe nut x i e n - V a c h true tiep d u o c tao tir set cat ket, chieu day dat 13,36m Dac d i e m thach hoc: mau x a m den, tang day, co cac khe nut x i e n va nhirng vay m i c a , cat ket m i n , manh xen kep - V a c h gia duoc tao tir set than, chieu day dat tir den 0,2m Dac d i e m thach hoc: mau x a m den, hoa thach thuc vat - T r y true tiep duoc tao tir set cat ket, chieu day dat , m Dac d i e m thach hoc: mau x a m den, co cac khe nut x i e n va n h u n g vay m i c a , cat ket m i n , m a n h , xen kep - T r u co ban duoc tao tir set ket, chieu day dat 8,14m Dac d i e m thach hoc: mau xam den, g i o n , hoa c i i n g be mat, k h o n g tham, co nhirng khe n i i t hoa thach thuc vat Qua trinh dao 16 se l a m k h i thoat v o i k h o i l u o n g la , m /phut K h o n g co b u i no than, khong co x u h u o n g tir chay ciia than A p lire m o tir 9,09 den 13,08 M P a ; N h i e t dat 10-22 °C So d u o n g 16 V i t r i dao 16 k h u v u c East V i l l a g e ve h u o n g d o n g nam, Banpo V i l l a g e dong bac, Mapingtou V i l l a g e phia tay, d u o n g 16 cao: , m den k h o a n g 1123,8m, cao ham 16: 528m den khoang 0 m V i t r i khai thac ham 16 tir T a y sang D o n g , 16 p h u gio ra, ba 16 t r u n g t a m tap t r u n g tai dai canh dong, d u o n g v a n tai la d u o n g dong 3, g u o n g 16 phia bac 3305 Cac dai khau 33053, 33052 va 33054 each 125m Qua t r i n h k h a i thac tai g u o n g 3311 da gay anh huong tuong d o i nho cho viec phan bo l a i i m g suat K e t l u a n 4.1 Md hinh sd Dua tren cac dieu k i e n dia chat, dieu k i e n da va than de thiet lap m o h i n h t i n h toan chieu guong 16 doc M o h i n h co quy m o dai x rong x cao: m x m x 35,8m, tong cong 11250 l u o i , 11476 niit Theo h u o n g thang d i i n g cua m o h i n h , v i a va vach true tiep, vach co ban, tru true tiep va t r u co duoc m o phong theo chieu day thuc te ciia dat da, theo cac dac tinh co hoc ciia da vay quanh vach va t r u v i a de l a m g i a m anh h u o n g h i e u l i n g bien ciia mo hinh Chieu cao ciia m o h i n h la 35,8m Lira chon cac t h o n g so c o l y ciia dat da Tuy theo cac ket qua thir n g h i e m co hoc da va lay m a u tai cho, k h i tai t r o n g dat den cuong cao nhat sau k h i dat da b i pha huy, sir d u n g m o h i n h M o h r - C o u l o m b va m o hinh khoang rong de t i n h toan Trong m o h i n h , the h i e n cac thong so co l y ciia v i a than tai v i i n g khao sat dia chat va cac ket qua thir n g h i e m c o hoc ciia da va than M o h i n h t i n h toan sau n h a m xac d i n h cac d i l u k i e n bien 411 Hoi nghi Cong nghiep khoa hoc kT thuat mo qudc ti mo tien tien vi sir phat trien - 2010 bin xung (1) M o h i n h cac d u o n g b i e n phai va trai duoc dat t o i m u c c u o n g ep den noi dich chuyen ranh g i o i ngang bang k h o n g (2) M o h i n h co d i n h b i e n nen de sir d i c h chuyen ranh g i a i thang d u n g va ngang ciia nen bang k h o n g (3) M o h i n h t a i d i n h ciia b i e n t y do: Sir d y n g m o h i n h t i n h toan de xac d i n h cac dieu k i e n t a i t r o n g : D y a tren sy phan bo irng suat theo tieu chuan ciia T r u n g Quoc t n r a n g i m g suit mo Si He thuoc t r u o n g i m g suat ngang M i r e u n g suat chii dao a day la i m g suat nen, huong ting suat ciia m o i phan dugc xac d i n h dya tren sy pha h u y m o h i n h , k h a i dong cac nut l u o i tga ciia m o h i n h u n g suat K h o a n g each tach v o g i u a cac phan tren mo h i n h ting suat la 3.5 theo h u o n g thang d u n g , t u o n g d u o n g v a i l y c n a m ngang la 7MPa Hinh Mo hinh ti'nh toan 4.2 Xdy dirng chuang trinh md phong de xac dinh khu vuc tdng, giam dp luc N h a m xac d i n h k h u v y c tang hay g i a m ap l y c k h u \TJC co ap l y c dugc dieu chinh tren quy m o va p h a m v i co c u o n g l a n nhat cung n h u trang thai phan bo ap lyc len tru than k h i tien g u o n g , can t i e n hanh n g h i e n ciru sy phan bo ap l y c len v i a than k h i dao ap lyc len dan chong truac g u o n g cung n h u nghien ciru phan t i c h anh h u o n g ciia sy phut va than D y a tren dieu k i e n k h a i thac v a dieu k i e n dia k y thuat ciia g u o n g chiing toi da xay d y n g dugc m o h i n h m o phong so hoa v a i cdc buac t i e n g u o n g lan l u a t la 3.6m,7.2m 10.8m 14.4m va 18,0m t r o n g qua t r i n h khai thac B e nhan biet dugc sy thay doi ap luc chan v o m t r o n g qua t r i n h b i e n dang dong, khoang each m o i b u a c t i e n g u o n g deu dugc tinh toan nham xac d i n h dugc sy phan bo ap l y c 4.3 Phan 4.3.1 Phan tich cdc ket qua md bo dp lire tren guong phong 16 doc via N h i n chung, v a i cac vach tren g u o n g than cirng v u n g t h i sy phut k h i va than nguy h i e m h a n so v a i cac l o p vach than m e m anh h u o n g cua v i t r i k h a i dao, sy pha hoa vach tryc tiep sy phan chia noc cung n h u cac dirt gay sut l i i n N h a sy phan bo lai ung suat nen sau k h i t h u h o i than, t r u o n g i m g suat ban dau b i pha huy t r a lai can bang, vach co ban t r a lai t i n h trang o n d i n h n h a dan chong tao m o t he thong cau t n i c hoan hao chiu dugc tai trgng dat da p h i a tren T r o n g k h i i m g suat len v i a than theo p h u o n g nam ngang anh h u a n g ciia he so Poisson, cung thay d o i theo chu k y Dat da x u n g quanh k h u vyc da khai thac tai g u o n g dugc phan bo l a i ap l y c va theo I o n , cac u n g suat thang dung co the dugc phan chia cac irng suat v u n g t h i i yeu cac k h u vuc co t i n g suat dugc dieu chinh hay suy g i a m , cac t i n g suat x u n g quanh vach co sy phan bo l a i cac dirt g a y 412 Hdi Cong nghi khoa nghiep hoc md tien ki thuat tien mo quoc vi su phat te - trien 2010 ben viing K h i tien hanh khai dao tai cac k h u v u c tap t r u n g u n g suat Sxx, Syy, Szz, Sxy co buoc t i l n guong k h o n g d o i , t h i n h i n chung, cac k h u v u c tap t r u n g u n g suat d v i t r i ban dau khong thay d o i K h i tien hanh khai dao d u d n g 16 doc, t h i tai g u o n g co sir phan bo l a i u n g suat, ap lire len cot c h o n g t r o n g d u d n g 16 tang dan va o n d i n h , d u d n g 16 g i u a cac t r u theo hudng chiu u n g suat Syy t r d nen o n d i n h sau k h i u n g suat g i a m -1.1693e-H307tO-1.16C -1.1600e+007to-1.15C -1.1500e+O07tO-1.14C 14.5m -1.1400e+007to-1.13C -1.1300e-H307 to-1.12C -1.1200e-H307 to-1.11C |I-1.2023O+007 -1.1100e-H)07 to to-1.101 -1.200 Interval1.0e+005 •1.2000e+007 to -1.100 •1.1900e+007to-1.180 10.9m |-1.1800e-K>07 to -1.170 1-1.17OOe+O07 to -1.160 1-1.16000+007 to -1.150 |-1.15000+007 to-1.140 zieeô+007 lo ã1.14000+007 to 1.210 -1.130 21000 +007 to 2O0 |-1.1300e+007 to-1•1.120 11.12000+007 2000 +007 to-1 to 1.190 112 7.3m 19000 1.180 Interval - +007 Oo+toOO S I.IBOOe +007 to 1 70 1.17000+007 lo 1.160 1600e+007toto-1.2600a •1 SO WBBMM -1.127S6O+007 15000+007loto-1.2400e 1.140 -1.26000+007 1.1400e+007loto-1.22000 130 -1.2400e+007 3.7m +007 to 1.1300e 120 -1.2200O+007 lo -1.20000 12000+007lo-1.1800a to 1.112 -1.2000O+007 -1.1800O+O07 lo -1.1600a -1.16000*007 to -1.1400a -1.1400O+007 to-1.1200a -1.12000+007 to-1.1127a 0.1m Interval m 2.0O+005 |-1.8491e+007 to-1.8000« |-1.800Qe+007 to-1.6000e -1.6000e+007to-1.4000« Hinh Quan trdc be mat -1.4000e+007 lo-1.20006 -1.2000e+007to-1.0000e 4.3.2 Anh huong ciia cong tdc khai dao to -8.0000e -1.00008+007 §|-8.0000e+006 to -7.053Se Trong qua t r i n h khai dao d u d n g 16, su phan bo u n g suat k h o i da xuat hien ben canh Interval - 2Qe+006 duong 16, ba u n g suat doc true tang dan, dac biet la theo h u d n g doc theo d u d n g 16, m u c tap trung ung suat cung tang cao./ Tdi lieu tham khao [1] F L A C S o f t w a r e A p p l i c a t i o n Notes [2] Peng w e n b i n g F L A C Practical G u i d e [ m ] M a c h i n e r y Industry Press 2007,12 [3] Briggs, H Characteristics o f outbursts o f gas i n mines [ J ] Trans Instn M i n Engrs, 1920(61): 119-146 [4] L a m a , R D M e c h a n i s m , control and management o f outbursts i n Australian coal mines [ A ] I n : U N - E C E Petersburg, 1994 Symp on Rock Bursts & Sudden 413 Outbursts [ C ] St ... he thong cau t n i c hoan hao chiu dugc tai trgng dat da p h i a tren T r o n g k h i i m g suat len v i a than theo p h u o n g nam ngang anh h u a n g ciia he so Poisson, cung thay d o i theo... dieu k i e n t a i t r o n g : D y a tren sy phan bo irng suat theo tieu chuan ciia T r u n g Quoc t n r a n g i m g suit mo Si He thuoc t r u o n g i m g suat ngang M i r e u n g suat chii dao... , 11476 niit Theo h u o n g thang d i i n g cua m o h i n h , v i a va vach true tiep, vach co ban, tru true tiep va t r u co duoc m o phong theo chieu day thuc te ciia dat da, theo cac dac tinh