Thong tin khoa hoc cong nghe mo NGHIEN c(jra oaef TRINH D|CH DQNG, BIEN D6NG BGT MO LP THIEN Vfl CflC CONG TRINH BE MflT hhi hhai Jhae ddng Jhai lo Jhien va ham 16 eac m6 sau According to the developm[.]
Thong tin khoa hoc cong nghe m o NGHIEN c(jra oaef TRINH D|CH DQNG, BIEN D6NG BGT MO LP THIEN Vfl CflC CONG TRINH BE MflT hhi hhai Jhae ddng Jhai lo Jhien va ham 16 eac m6 sau According to the development planning for the coal sector to the year 2015 and the prospect to the year 2025 the coal productivity at Cam Pha area will account for 40% of the total coal capacity in VINACOMIN The open and underground coal co-mining process will be carried out at the same time, creating the changes In the natural equilibrium of the rock masses and causing the deformation and displacement of the open pit slopes and surface constructions which need being studied carefully for ensuring safety In the mining process at deep coal mines in Cam Pha area Dac diem dja chat khu vifc khoang sang than Cao Sdn - Khe Cham II Khoang sang than Khe Cham II thupc canh Bac khdi dja chat trung tam Cam Pha, phia Nam dtfdc gidi han bdi dtft gay F.A, phia Dong va Dong Bac la dut gay F.L, phi'a Tay la ranh gidi phan chia Khe Cham - Khe Tam, dja hinh cao b tmng tam (dinh Cao Sdn) va trai dan len phia Bac va tha'p dan ve phia Nam va Dong Dja hinh hien da thay ddi hoan TS NGUYEN ANH TUAN KS Lt XUAN THU Vien Khoa hoc Cdng nghi Md - TKV Ncs N G U Y I N VAN SY Trudng Cao ding NgheMd HQu Nghi toan va bj phan cat manh khai thac va 66 thai Dja tang chtfa than ciia khoang sang thuoc he Triat thdng thtfdng bac Nori diep Hdn Gai gitfa (T3nr-hg2) Tdng chieu day cCia dja tang chtfa than khoang 1500 -5- 2000m Trong cot dja tang co cac loai da: cuoi san ket, cat ket, bot ket, set ket va cac via than ttf via den via 14-5 He thdng dtft gay bao gdm diit gay F.A d phia Nam, dtft gay F.A cd phtfdng gan vT tuyen, cam nam, vdi gdc ttf 50° - 60°, ddi pha hu9 ttf 300 ^ 500 m, dtft gay F.A la ranh gidi phan chia khdi dja chat Bac va Nam Cam Pha Dtft gay F.L cd phtfdng chay Tay Bac - Ddng Nam cam Tay Nam vdi gdc ttf 60° - 70°, ddi pha hu^ ttf 20 50m, dtft gay F.L la ranh gidi phan chia khoang sang Khe Cham II vdi Khe Cham I va Mong Dtfdng, cau tnic kien tao chung ciia khoang sang khe Cham IV - Cao Sdn dtfdc mo ta tren hinh Hinhl Mdt cdt dia chat TXF Cao Son - Khe Chdm II KHCNM S6 1+2/2010* CNKT HAM LO Thong tin khoa hpc cong nghe m o Trong dja tang khoang sang than Khe Cham II - Cao Sdn tdn tai tap via than Tap via than tren (ttf via 14-5 den via 13-1), tap via than gitfa (ttf via 12 den via 9) va tap via than dtfdi (ttf via den via 1) cac via than thuoc tap tren c6 chieu day Idn va kha dn djnh nhtf via 14-5, 13-1, (chieu day via ttf 3,55 + 12,93 m) nhtfng cung CO nhung via chi tdn tai pham vj hep dtfdi dang thau kinh, hoac tach ttf cac via chinh Cau tao ciia via than thay ddi ttf ddn gian (1 den Idp kep) den phtfc tap (3 den Idp kep) va ra't phtfc tap (7 Idp kep trd len) Tap via than tren phan bd sau nhat den mtfc -180 Tap via than gitfa bao gdm cac via ttf 12 ^ 9, c6 chieu day kha dn djnh va tri gan nhtf hau khap tren dien tich khoang sang - tap via gitfa phan bd ttf mtfc -200 - -350 Tap via dtfdi bao gdm cac via ttf via den via phan bd d sau dtfdi mdd -350 khoang dia tang ttf 500 den 550m Cac via than thtfdng c6 chieu day mong khong dn dinh (m > 0.8 m) cac via than c6 cau tao ddn gian cha't Itfdng tdt Dac diem cac via than thuoc khoang sang Khe Cham II - Cao Sdn dtfdc tdng hdp bang 1, chat Itfdng than dtfdc tdng hdp bang Do chtfa ttf nhien cac via than theo ket qua phan tich cho tha'y, khoang sang than Khe Cham II - Cao Sdn cd khf doc, chay nd, dac biet la ham Itfdng nd c6 dac diem tang dan theo chieu sau, hoac tap trung tai vj tri phan bd ciia nep Idi, cac cdng trinh khai thac 16 bang chii yeu nam ddi chtfa nitd, metan, c6 the xep vao nhdm mo cap I theo mtfc nguy hiem ve Cac cong trinh khai thac 16 gieng tren mtfc -150 chu yeu nam ddi chtfa metan, nitd, c6 the xep vao loai cap II, III Cac cong trinh khai thac 16 gieng ttf mtfc dtfdi -150 chii yeu nam ddi metan, c6 the xep vao loai mo cap III va cao hdn Ket qua tdng hdp ve ham Itfdng va chtfa ttf nhien cho thay, cue bo cd nhtfng mau ham Itfdng den 71,77% (LK-2727-V.'lO)^ 06 chtfa ttf nhien c6 mlu tdi 10.375 cm^/gKC (LK - TK.7 V.10 d dd sau -502m; 19,73 cm'/gKC (LK - TK.7 - V.11 d sau - 387,66m) Tong hdp ham Itfdng, chtfa ttf nhien theo via va theo mtfc cao dtfdc the hien bang va bang Bang 1: Tdng hgp ddc diem cdc via than Ten via than CD tdng q u i t cua via (m) VMS 9.31(449) 3.48(296) 3.67(292) 1.64(98) 4.00(244) 5.59(325) 1.81(221) 3.90(145) 5.57(80) 2.34(34) 4.73(19) 2.25(6) 1.51(6) 0.94(4) 1.73(5) 0.91(4) 0.77(5) 2.16(2) V144 V142 V141 V132 V131 V12 V11 V10 V9 V8 V7 V6 V5A V5 V5B V4 V3 Chieu day rieng than (m) K.TTL Tong T1 (TTL) 8.08 3.02 3.26 1.51 3.56 4.46 1.61 3.49 4.86 2.2 4.39 2.2 1.53 0.94 1.29 0.91 0.77 1.84 8.08 3.02 3.26 1.51 3.56 4.46 1.61 3.49 4.86 2.2 4.39 2.2 1.53 0.94 1.29 0.91 0.77 1.84 KHCNM s o 1+2/2010* CNKT HAM LO 0 0 0 0 0 0 0 0 0 Chieu day da kep (m) So Idp kep (sd idp) Do ddc 1.22 0.43 0.44 0.14 0.44 1.15 0.21 0.41 0.71 0.14 0.34 0.05 0.19 0.43 0 0.32 0.92 0.91 0.33 1.31 1.83 0.41 0.87 1.43 0.44 0.74 0.33 0.6 0.8 0 0.5 27 29 26.5 24.62 24.53 26.19 24.22 25.85 24.68 24.15 30 18.33 19.5 19,75 27.4 31.25 33 35 Thong tin khoa hoc cong nghe m o Bang 2: Tdng hpp cdc chi tidu chu ydu chat luong than Ten via A''«,c(%) 145 12.01(1273) 13.08(261) 144 142 14.15(230) 12.9(391) 141 132 A** och ® tb Q''tt,.(Kcal/kg) d-a.cCg/cm') Vch., 1.44(600) 1.5(82) 7.37(995) 7.37(188) 1.59(1187) 15.86(91) 7303(770) 7036(154) 2.07(229) 0.62(409) 0.72(86) 13.64(136) 7236(255) 1.47(149) 7.49(314) 2.04(387) 0.65(128) 18.99(50) 19.02(34) 6386(34) 1.54(24) 8.49(41) 2.41(50) 0.67(26) 14.08(301) 14.86(107) 7154(181) 1.54(97) 7.9(236) 2.52(297) 0.62(101) 131 12.97(660) 7259(398) 6872(83) 7.91(541) 2.05(578) 0.57(277) 16.99(141) 15.08(177) 18.08(82) 1.48(286) 12 1.54(62) 9.22(104) 2.36(128) 0.82(75) 11 12.2(199) 13.47(71) 1.49(83) 8.27(154) 10 12.25(159) 12.27(26) 14.17(48) 14.17(17) 7293(122) 7314(97) 7318(21) 1.51(65) 1.45(14) 7.51(122) 8.25(22) 2.51(187) 2.62(157) 2.77(26) 12.94(1) 13.29(4) 33.07(2) 20.87(6) 12.99(1) 7260(1) 6934(3) 1.47(1) 1.57(1) 7.19(1) 7.34(4) 5395(2) 1.64(2) 5A 14.74(2) 16.69(2) 32.63(1) 29.07(1) 12.95(1) 7149(2) 5715(1) 29.07(1) 8.04(1) 5715(1) 1.46(2) 1.65(1) 1.65(1) 10.98(2) 5.3(2) " HH 8.78(1) 8.78(1) W^'tb 4.69(1) 2.95(4) 3.91(2) 4.37(2) 4.52(1) 4.52(1) 0.55(85) 0.58(67) 0.69(13) 0.57(1) 0.41(3) 0.45(2) 0.52(2) 0.7(1) 0.7(1) Bang 3: Tdng hgp ket qua hdm lugng, dd chiia cdc via than Ten via TT (2) V.I 4-5 V.I 4-4 V.I 4-2 V.14-1 V.I 3-2 V.13-1 V.12 V.11 V.10 V.9 V.8 (1) • Ham Itfdng thtfc c i c chat khf (%) CO2 CH4 Hz+CH4 Hz (6) (3) (4) (5) 0,78 9,16 9,94 12,61 11,36 10,84 11,48 0,52 16,02 7,63 2,44 13,58 10,44 1,25 9,19 8,59 1,50 21.84 20,34 7,72 16,41 18,94 8,18 2,53 24,41 26.40 1,99 8,34 24.14 20,84 3,30 9,22 27.78 24,78 3,00 8,07 30.10 29,06 1,04 7,45 48,52 47,23 1,29 6,89 10 11 Do chtfa ttf H, COj (7) (8) 0,547 0,05 2.954 0,248 0,76 0,136 0.34 0,057 0,874 0,094 0,472 0,192 1,046 0,177 0,86 0,619 0,406 0,709 0,061 0,348 0,215 0,041 nhien (cmVgkc) CH4 H2+CH4 (9) 0,478 1,384 1,422 0,526 2,324 1,021 2,622 1,767 2,398 1,921 1,514 (10) 0.528 1.632 1,558 0.583 2,417 1.213 2,799 2,386 2.804 1,983 1.554 Bang 4: Tdng hgp cac chat theo dd cao Mtfc cao Ham Itfdng thtfc cac chat (%) Do chtfa khf ttf nhien (cmVgkc) CO2 »2 CH4 H2+CH4 CO2 Hz CH4 H2+CH4 LV + +40 19,03 1,53 2,86 4,39 1,698 0.132 0.258 0,39 +40+-150 9,46 1,51 13,28 14,79 1,014 0.138 1,035 1.172 -150^-350 7,59 1,79 24,29 26,08 0,557 0,119 1.979 2,098 >-350 9,74 5,49 23,76 29,25 1,289 0.751 3.111 3,863 KHCNM S 1+2/2010* CNKT HAM L Thong tin khoa hoc cong nghe m o Bang 5: Tdng hgp cac chi tieu coly da Ctfdng Ctfdng Dung Ty khang keo khangnen (g/cm') (g/cm') (Kg/cm^) (Kg/cm^) 2.56 233 2.67 966.88 Cuoi san ke't 2.64 97.31 2.72 776.48 Cat ket 87.5 2.73 2.65 448 Bot ket 2.56 2.52 Set ket 168.41 Bang 6: Tdng hgp kdt qua cac chi tieu coly da vach via Ten da Via Dung y(g/cm3) 2.71 V14 2.61 2.72 V14 2.70 2.725 V14 2.70 2.69 V14 2.68 V13 2.65 2.71 2.715 V13 2.60 2.76 V12 2.675 2.69 V11 2.60 V10 2.73 2.65 V9 2.645 2.715 V8 2.68 2.735 Bang 7: Tdng hgp ket qua cac chi Via V14 V14 V14 V14 V13 V13 V12 V11 V10 V9 V8 V7 V6 V5 V4 Dung Y(g/cm') 2.613 2.63 2.67 2.66 2.655 2.67 2.675 2.68 2.60 2.64 2.655 2.66 2.60 2.73 Ctfdng khang nen on(kg/em^) 1145 644 800 604 625 808 823 1054 808 643 727 tieu coly o try via Ty A (kg/cm^) Ty A(kg/cm') 2.70 2.71 2.735 2.75 2.73 2.725 2.76 2.74 2.70 2.73 2.685 2.76 2.69 2.69 2.74 Da't da tram tich dja tang chtfa than khoang sang Cao Sdn - Khe Cham bao gdm: cuoi ket, san ket, cat ket, bot ket, set ket Chieu day cac Idp bien ddi theo phtfdng, theo dien tich va theo sau Cac Idp da hat tho cuoi ket, san ket, cat ket phan bd b phan Ctfdng khang nen CTn(kg/cm') 962 743 754 264 456 654 689 494 652 593 1211 521 963 1122 778 Lire dinh ket C(kg/em') 293 202 284 98 100 296 251 300 234 204 215 Lire dinh ke't (TB) (Kg/em^ 32 31 30.34 381.66 324.88 213.55 Goe noi ma sat 9(dd) He so ben f 3204231°20' 2Z°5Q' 39°20' 34°40' 32°47' 33°50' 33°30" 31°45' 33°12' 34''25' 11.40 6.40 8.00 6.00 6.20 8.00 8.20 10.50 8.10 6.40 7.20 Life dfnh k i t C(kg/em') 253 420 232 106 175 258 300 152 220 238 368 Gde noi ma sat (p(dd) 32''50' 32°30' 32°30' 33°15' 35°07' 34°40' 34''50' 33°30' 30°36' 33°50' 33°30' 370 33° 240 34° tren ciia dja tang va khoang gitfa cac via than Cac Idp da hat mjn bot ket, set ket phan bd b vach tru cac via than va thtfdng c6 cau tao phan Idp mong xen kep via Rieng cac Idp set ket than phan bd rat ban che, chung nam trtfc tie'p tren vach tru cac via than KHCNM s o 1+2/2010* CNKT HAM LO Goc noi ma sat (9°) He sd benf 9.6 7.4 7.5 2.6 4.5 6.5 6.9 4.9 6.5 5.9 12.1 5.2 9.6 11.2 7.7 c6 chieu day ttf 0,2m den 2,0 m, set ket than c6 mau xam den, mem bd diing tay bop vd dtfdc, gap ntfdc de trtfdng nd, Idp thtfdng bj boc di ciing vdi qua trinh khai thac than Tinh chat cd ly dac trtfng cCia cac loai da dtfdc tdng hdp bang va da vach, da Thong tin khoa hpc cong nghe m o tru dtfdc tdng hdp bang Tinh toan sut lun va bien dang khai thac dong thdi Id thien va ham Id Trong khdi da ctfng, qua trinh khai thac ddng thdi lo thien va ham 16 se lam thay ddi trang thai tfng suat cCia khdi da dan tdi thay ddi goc ddc cua bd mo Tren hinh gidi thieu sd 66 lam viec ciia bd mo khai thac cac via than nam ngang vdi trinh ttf khai thac ham 16 khac Ttf Sd 66 hinh cho thay bien dang ciia be mat bd mo xay theo dang lun va djch chuyen dat da trtfc tiep khong lien tuc dtfdi tac dong cua khai thac ham 16 theo dang trtfdt, ket qua la pha vd stf dn djnh ciia bd mo qua trinh khai thac Tren sd 66 hinh gidi thieu phtfdng phap xac djnh ddi cong ciia vectd tfng suat chfnh va bien gidi cOa ddi cong theo gidi ban bd mo lo thien Ttf sd 66 hinh xac djnh dtfdc khoang each Idn nhat ttf tam khai thac ham 16 den bien gidi bd mo 16 thien theo cong thtfc thtfc nghiem [2] a= H cotga,+(H-Hgo)tg(45 - ^ ) m Trong dd, H: Chieu cao bd mo tai vj tri tinh, m; eg Gdc nghieng dia bd mo, dp; H90: Chieu cao ntft tach thing dtfng, m; 9: Goc ma sat ciia khdi da mo, Qua trinh thay ddi dieu kien dn dinh ciia bd mo dtfdi tac dong ciia khai thac ham 16 din den lam thay ddi cac a, Khi khai thac ham Id dudi chan bd mo b, Khi khai thac ham Id dudi chan toan bd mo c, Khi khai thac ham Id dudi phan tren cua bd mo Hinh 2: So dd phan bd dudng djch chuyen ciia khdi da bd md khai thac ddng thdi Id thien ham Id / : : / /\ /A, A^ y _" : 2I ; (i \ - - - \ V7_3; ~9 /^ _ 32 an a' — Hinh 3: Soddxdc djnh bien gidi ciia ddi vectoiing xuat chinh bOmo Id thien a b -y Hinh 4: So dd dexac djnh suthay ddi gdc ddc cua bdmd khai thdc ddng thdi Id thien ham Id thong sd hinh hoc ciia bd mo (hinh 4) Stf thay ddi goc nghieng ciia bd mo Aa dtfdc xac djnh theo cdng thtfc: khai thac ham 16, Ttf sd 66 hinh 4, gia trj Aa dtfdc xac dinh nhtf sau: Aa = arcsin U'-U\ m) A a = ttH - aK Trong dd, a„: Gdc nghieng ciia bd mo trtfdc khai thac ham 16; aK: Gdc nghieng sau KHCNM S 1+2/2010* CNKT HAM LO Cf day, U'H, U'B: Djch chuyen vuong gdc vdi mai doc t?' chan va dinh ciia bd mo, Thong tin khoa hoc cong nghe m o hn: chieu dai bd mo Tinh toan sut lun va bien dang ciia bd mo lo thien va viing be mat gan bd mo khai thac ddng thdi 16 thien ham 16 dtfdc thtfc hien theo cac btfdc sau: * Xac dinh he sd dn djnh ciia toan khu khai thac theo hai mat cat vuong goc vdi n, va n2, theo phtfdng via n.=th(^) 2H O day, co': Tinh chat Itfu bien cua da, thay ddi 1,5 -^ 4,5 va phu thuoc va tinh chat phan Idp ciia da H: Khoang each trung binh ttf vach khong gian khai thac ham 16 den bd mo hay la be mat dja hinh, m Khi vach ciia dtfdng 16 da phan Idp nghieng thi: //(fi)—+fiVgT+r/(fi)— -cdtg^ n2 = - ^ ^ ^ * Tinh toan gia tri sut lun theo mat cat (theo htfdng ddc va theo phtfdng) theo cac cong thtfc da gidi thieu b tren * Tinh toan ddc (IK), cong (Kx) va bien dang cat hay nen (e) * Tien hanh tinh toan ttfdng ttf ddi vdi bd mo 16 thien Ke't qua tinh toan dn djnh cho mat bang san cong nghiep md than ham 16 Khe Charn II - IV can ctf cau tao dja cha't khu vtfc san cong nghiep mo ham 16 Khe Cham II - IV, mo hinh tinh toan dn dinh dtfdc Itfa chon theo sd dd trtfdt phing mat trtfdt mot pham vi dai theo mat tiep xuc yeu (mat Idp, mat dtft gay) cdn phan chan cat qua cac Idp vdi g6ce=(45-^) Do ben ti'nh toan dtfdc Itfa chon tren cd sd tdng hdp toan bo cac ket qua thi nghiem tinh chat cd ly ciia cac loai da c6 mat dja tang theo phtfdng cat Idp va theo cac mat yeu ttf nhien ttf cac bao cao tham dd, khao sat, nghien ctfu dja chat, dja chat cong trinh khoang sang than Cao Sdn - Khe Cham II den 31/12/2008 va bao cao tdng ket de tai hdp tac qudc te gitfa Vien Khoa hoc Cdng nghe Mo va Vien VNIMI (Lien bang Nga) ve dn dinh bd mo Cao Sdn nam 1990, 2003 [5],[6] He sd dtf trtf dtfa vao tinh toan dtfdc Itfa chon n=1,3 (vdi cap cong trinh dac biet, co thdi gian tdn tai Idn hdn 100 nam) Khi cac thdng sd tinh toan dtfdc xac djnh nhtf sau: - Trong Itfdng the ti'ch: y = 2,62T/m^ - Ltfc dinh ket khdi: CK=66,98T/ml - Goc ma sat ciia khdi: (PK= 24,69° - Ltfc dinh ket cat qua dtft gay: Cd=3,85T/m^ - Goc ma sat cat qua dtft gay: (PK= 22,25° - Ltfc dinh ket theo tiep xuc than - set ket: C = 2,39 T/m^ - Gdc ma sat theo tiep xuc than-set ket: (P'K= 13.23° Ket qua tinh toan cho thay, bd mo dam bao dn djnh Vdi bd mo c6 ket ca'u dang Idi a, = 35°, a2= 26°, goc ddc ket thuc ciia bd a = 30° he sd dn djnh n > 1,05 KHCNM s o 1+2/2010* CNKT HAM LO Ke't luan Khoang sang than Khe Cham II - Cao Sdn dtfdc thiet ke khai thac ddng thdi lo thien va ham 16 den mtfc -550 la mo sau nha't nhtfng nam tdi Vdi cau true