ThSng tin khoa hoc cong nghe mo w NGHIEN CCKU Lllfi CHON CONG NGHE KHfi l TH^C HGfp LY CHO CAC KHU Virc VIA THAN N A M DUOfI CAC CONG TRINH CAN BAO VE thuoc khu canh Nam mo than Mao Khe According to t[.]
ThSng tin khoa hoc cong nghe m o w NGHIEN CCKU Lllfi CHON CONG NGHE KHfil TH^C HGfp LY CHO CAC KHU Virc VIA THAN NAM DUOfI CAC CONG TRINH CAN BAO VE thuoc khu canh Nam mo than Mao Khe According to the database fr6m the geological conditions of the coal seams at Canh Nam site of Mao Khe coal mine, the coal reserve volume under the surface objects needed to be protected is very great Depending on the overseas experiences, the researcher group from IMSAT has studied on the selection of the coal mining technology with the roof control and back filling method for extracting this reserve volume TS.TRU'O'NG DU'C 01/ ThS.TRAN TUAN NGAN Vi$n Khoa hgc Cong ngh$ M6 - Vinacomin ThS NGUYEN VAN TUAN C6ng ty TNHH tilTVthanUao Khi- Vinacomin €)4 ti§n hanh khai thac cac mCPC (Jp t6n th^t se tang din vFa than dLrai cac cong trinh theo chleu sau khai thac can bao ve tren mgt dat, mpt so Khu vuc canh Nam khoang nuac CO n§n cong nghiep than sang than Cong ty than Mao phat tri§n da nghien CLHU khai Khe quan ly va khai thac, bao thac de lai cac dai tru bao ve gom cac via than: via 6, 7, 8, cho , ti>ng _ vfa, tuong LPng cho 8a, 9,9a va via 10 Cac via than moi cong trinh be mat Hien pay c6 dac dilm: chi^u day via o6 nhieu phuo'ng phap xay bien dong tff day tmng binh den dM'ng try bao ve khac cua j ^ y g^c doc cua via I6n, thay cac nu-CTC nhu*: Nga, Ba Lan, doi tir 45° dSn 65°, tuong doi on lyiy Tai Ba Lan, 3h khai thac djnh Dia hInh khu vuc cac vfa than day n§m dyoi khu giai han khai thac c6 nhieu h6, VLTC dan cu", ngu-oi ta si> dung suoi, moong chu'a nude, nhu' phu'ong phap khai thac ket hgp cac h6 Cau Cuon, Ba Cpc, Noi v6i Chen 16 hay phU'O'ng phap Hoang, cac sufii Binh Minh, lundeu.TaiAustralia,debaove ooan ket, Trang Bach, Y6n cac cong trinh tren be mat, j h g , nhifng moong khai thac 16 nguffi ta khai thac va de lai cac cac via va khu vuc dan cu' sinh tru bao ve bang than g\Ot vach s6ng, phia Nam cua khu vuc c6 qua trinh khai thac Tai flu'dng 3i$n quoc gia 110kV, la CHLB Due, de bao v$ cac c6ng nh&ng 361 tugng can du'^i'o bao trinh tren b l mat, ngu'o'i ta da ve Tru lu'O'ng than nam si> dung he thong khai thac cac khu vyc can bao v0 cua buong cot cac via than thuoc canh Nam la d Viet Nam, hlu hit cac mo rat Ifrn, vSy, viec nghiSn ciru hkm 16 su dung giai phap khai |ua chpn cac giai phap c6ng th4c de lai tru than bao ve cac ngh$ de khai thac phan tai c6ng trinh tren mgt dat va ve co nguyen va bao v$ cac cong ban, da dap ung t6t cac ySu cau trinh be mat la rat c i n thiet d|t Tuy nhien, vi$o de l$i tm Danh gia tong tujrp trir than bao ve cung d6ng nghta \injmg phan b6 ciic tru vai vi^c gay ton thit tdl nguyen, bao v^ cua cac via than thu9C khu vLPc canh Nam, mo IVIao Khe Dg'a vao cac dieu kien an toan khai thac dudi cac cong trinh can bao ve; di^u kien khai thac duoi nha cO-a va cong trinh dan dung; dieu kien khai thac than dudi rirng cay, ruong vucm va bai thai dat da; dieu kien khai thac than duoi cac doi tupng chija nuac , Vien Khoa hoc Cong nghe IVIo-Vinacomin (Vien KHCN Mo) da tiSn hanh aanh gia tong hop tr& lugng phan bo cac tru bao ve cua cac via than thuoc khu vu'c canh Nam mo Mao Khe Kk qua danh gia duffc t h i hien bang Tren CO" so" ket qua danh gia tong hep, nh6m nghien ciiu da tien hanh phan tich cac moi tuong quan gii/a cac yeu to dieu kipn dia chat, dilu ki^n ky thuat mo, phgc vu vipc Ip-a chgn c6ng nghe khai thac hep \-!/, dac biet la tuong quan giua cac yiu to chieu day va g6c doc via cua phin trO lupng cac khu VU'C can bao ve (bang va bleu hinh 1) Qua bilu hInh 1, cho th^y: - Tru' lucng than nam KHCNM SO 6/2012* CNKT HAM LO Thong tin khoa hpc cong nghg m6 Bang Phan bo tru' Iwqfng nim c6c try bSo v^ be m$t cua c6c via than khu v^pc cinh Nam mo M^o Khe TrOf Itft/ng nkm trii b^o v^ cic cdng trinh (10' Tin) Ten via Su6i Sudi Suil Su6i Su6i Sudi Sudi DDK- DDKVSn BoAn Tring TrAng 6frV llOkV BM1 BM2 BM3 L6i KM Kh§ B^ch 75.3 36.2 1710,3 Via 10 1540,3 Via 9b 112,0 28,3 59.5 42,3 2562,9 Via 9a 201,9 72,2 65,3 45,5 82,4 3262,0 Via 96,7 118.3 68,4 103.9 111,8 26.0 29.7 118,2 48,3 131.7 1020,6 Via 25,0 36.3 21.8 33,6 Via 8a 47.5 30.5 34.2 213,6 Via? 53,1 19.4 34.6 19,9 Viae Tong 410,e 218,8 323.2 429,9 347,9 244,9 34,6 1.6 CO, H6 TdngirQ DDK- Khu H6Ba mong 1^ Ciu luvng cac Cpc 220*1' dSncu IhiSn Cu6n truBV 105.8 1024,0 58.0 3009,6 144,1 556.0 3452.1 139,7 738,4 91,5 1105.5 327,5 485,3 36.0 869,0 5853,5 1324.1 373.6 485.8 758,5 6729,1 411.2 844,4 303S,9 434,8 119.1 83.7 82.5 402,0 129.6 49.0 504,4 124,0 251,0 19,9 10309,73459,0 2547,2 1688,9 180,1 3027,9 23240,8 cac tru bao v$ c6 dieu kien goc Bing PhSn chia trO'lu^g theo to hop theo yeu to chieu day d6c den 45° la 2.293,3 ngan va gdc doc via tan, chiem 9,9% so vo-i tong truGoc doc den 45° Goc doc tren 45° Tong cgng Chieu day lu'O'ng cua khu vyc, Tru lu'ffng Tru- lu'O'ng TrO tuong chilu day via den 3,5m la 489,2 (ngSn tan) (ngSn tan) (ng^n tan) ngan tan, chi^m 2,1%; chieu m5,0 6,9 40,4 1603,9 7791,6 33,5 9395,4 1603,9 ngan tan, chi§m 6,9% Tong cong 9,9 2293,3 20947,3 S0,1 23240,6 100,0 - Tru" lu'O'ng than n i m cac try bao ve c6 di^u kien goc d6c lo-n hen 45° la 20.947,3 ngan t i n , chiem 90,1%, do: chi§u day via den 3,5m la 7.492,3 ngan tan, chiem 32,2%, chi§u day via khoang 3,5 d§n 5,0m la 5.663,5 ngan t i n , chiem 24,4%; chi^u day via tren 5m la 791,5 ngan tan, chiem 33,5 % Nhu' vay, phan lo-n tru' lu-cng than nam cac tru bao v$ b§ mat cua canh Nam la cac khu VLFC via c6 dieu kien ve goc d6c lo'n ho'n 45° Nghien ciru dd x u i t cac giai phap cong nghe khai ^ a>is thac cac via than dipai cac Chiou day via, m cong trinh bao ve thuoc canh Goc die via Sit Nam mo Mao Khe Dya vao k§t qua danh gia HInh Moi tuvng quan glira to hap chieu diy, goc doc via t6ng ho'p trO lu'O'ng va dac dilm v&i tong trie lu'O'ng nam cic trfi bio v$ m KIlCiSiM SO 6,2012> CNKT I I , \ M L ( ) % % % Thong tin khoa hpc cong nghe m o di^u kien dja chat cac khu vyc via than n§m khu vu'c cac try bao v$ cac cong trinh be mat va kinh nghi$m khat thac cac khu vyc via than nam du'oi cac cong trinh can bao v0 cua nu'O'c ngoai, Vien KHCN Mo de xuat cac sc cong ngh? khai thac cho cac khu vyc via than nam du'O'i cac c6ng trinh can bao ve cua khu canh Nam mo Mao Khe, nhu-sau 2.1 Doi vdi khu v{pc via c6 chieu day (Ten 3,5m, goc doc Icm htm 35° Ap dung h? thong khai thac cot dai theo dp doc khai th^c toan bo chigu day via k^t ho'p vdi Chen 16 theo hu'ong ty dyoi len So d6 cong ngh$ va cong tac khiu than, chong guang khai thac du-gc giai thi$u tren hinh Cong tac chuan bj: khu vuc du-oc chia cac tang khai thac, chj§u dai theo hu'ang doc cua tang ti> 95 -120 m, bai he th6ng cac 16 dQC via da va 16 xuyen via 6" hai mCfC vgn tai va thong gio (c6 the la 16 xuydn via va 16 dgc via than) Trong m6i tang, theo phu'cng, du'Q'c chia ti>ng cgt bo'i c^c 16 thu-p-ng thong gio (2) dao bam try via Chilu dai theo phu-ang cua moi cpt khoang 150m, w mpt dai, tien h^nh cong tac Chen giCc vach Vgt lieu chen du'Q'c chuJin bj ti> ngoai mat bang du'a v^o ch6n cho 16 chp', qua du'6'ng 16 thong gi6 chinh, qua 16 thu'p'ng thong gio cua cot Sau ch6n xong, hinh 16 thu'p'ng vgn tai (6) cua cpt, giu" l^i 16 dpc via thong gio (4) de lam 16 v|in tai cho dai khau ti^p theo Tuy theo dieu ki$n da v^ch va tinh chat cua than, chpn byb'c chen cho phu ho'p Th6ng thu'6ng dp ben vu'ng cua kh6i than nho, da vach 16 chp' yeu thi bu'O'c chen giam xuong, c6 t h i tu- - m, o" cac via chilu day khong lo'n, khoi than nguyen ben vu-ng, da vach 16 chp' ben vOng thi bu-ac chen tang den 12 m va lan han Cong tac khai thdc Khai thac toan bp chi^u d^y via ket hep vo'i ch6n 16 toan ph^n theo hu'ang tCr du-b-i len Vi$c khai thac m6i cot du'p'c ti^n hanh nhu* sau: Khiu l l n lu-p-t cac dai theo chi^u d6c c6 gu-ang 16 chp' d^i tu' -15 m ke ti> 16 thu'p'ng cOt thong gio (2), mpt cpt, khiu dat d6ng thai tLP hai canh vk Trung tam Khau gu'ang bang cong nghe khoan no min, chong giu" khong gian 16 chg' bing vi ch6ng g6 Trong qua trinh khai thac, 2.2 Doi v&i khu vi^ c6 ch6ng giu- hinh 16 dpc via chieu day Ion ho'n 3,5m, goc thong gio (4), 16 dpc via van tai doc 35°- 45^ (5) mat di theo t6c dp tien Ap dung he thong khai thac guang Sau khai thac xong cpt dai theo dp d6c, khai thac Ghi chu: ^ Ld xuy&n via thdng gi6: - Ld thuiyng Ihdng gid; 3- Ld doc via thdng gid dA; 4- Ld doc via thong gio phan tSng - Ld doc via van tSi phSn tSng, 6-Ld thuv^ng v$n tai than, 7- Ld xuy§n via v$n ta than; d-Ld doc via v$n tii than da, - Bit dS chdn bio v$ du-ding Id; 10 - DM d& ch^n lc -80/lp via cua khu Bong Nam I (vi tri TVIIa) d^ tinh toan thiet ki va xay dyng giai phap cong nghe (day la khu vyc dac tryng cho cac via than canh Nam) Hien tai, khu vyc da dupe quy hcach va dang tiSn hanh dao cac dyang 16 chuin bi, bao gom: 16 dpc via da muc -80,16 xuyen via va cup myc -80 16 thypng da myc 80/16 via Khu vyc khai thac c6 yu dilm: gan bk mat d|a hinh, cung dp ngan, thuan Ipi cho c6ng tic y^n chuyin v$t li^u, d^c bi$t \i v$t li^u d l ch6n 16 cho qui trinh khai thSc V| trI vS di4u ki$n dja chlit cua khu vyc 16 chp thilt k l nhy sau: tiip via la sat kit, set than chiki day 5,5 -10m d l s j p d6, tiep d i n la bOt kk phan b6 deu, cat k i t chiiu day 10 - 20m Vach tryc tiip kh6ng 6n dinh den 6n dinh trung binh, cy6ng dp Khu vyc dypc gl6'i han: phia 06ng \i ranh gi6'i tri,j bio v$ khang n6n on = 45,3 Mpa vacli su6i bi mjt, phia Tay \i gM ca ban s$p d6 trung binh, han khai thSc cQ, phia Nam li cy6ng dO khang nan an = 67,5 dy6ng d6ng myc -80, phia B^c Mpa Tru tnj'c tilp la tap set kit \i 1$ via Via dypc chia \im chiiu day 2,0 -14m, tiip din la hai I6p, 16'P vach c6 chi^u day b6t k i t phan b6 d i u chiiu day thay d i i -2,31m, trung binh - 7m, trg y i u d i n bin vOng 1,2m (chi^u day n§ng than thay trung binh d6i -1,99m, trung binh 1,0m), Tren ca so' cac sa c6ng g6c d6c trung binh 60° Trong ngh# khai thac, diiu khiln da via c6 1+3 I6p da kep vt>\ t6ng vach bling phyang phap chen chieu day trung binh 0,2m TrC/ 16 da d i xuit d i khai thac cac lypng c6 kha nang khai thac via pham vi try bao v0 cac 16'P vach 22.000 t i n L6'p try c6 o6ng trinh b i m l t canh Nam, chieu day thay doi 4,31 - 8,94m, thiit k i chpn sa cong ngh$ trung binh 6,38m (chieu day khai thac cpt dai theo huang rieng than thay doi 3,56 d i e khai thac chia 16'p ngang 6,85m, trung binh 4,75m), goc nghiSng vai chen 16 theo thy t^ doc trung binh 58° Trong via c6 (!> dyo'i len Ban chat cua so trung binh -1216'p da kep v6i cong nghe (hinh 5), nhy sau: tong chieu day trung binh Cong tac chuan bi Khu vuc 1,63m TrO lupng c6 kha nang khai thac dupe chia tCrng khai thac lap try 118 000 tan cpt bo'i cac mang 16 thong gio, Chi§u day tap da giu-a hai 16'p la cac 16 thypng dao bam vach trung binh 3,0m Ba vach tryc via, chiiu dai theo phyang cua Hinh Scy CNKT cot dai theo hirang doc, khai thic chia lOp ngang - nghiing, d/eu khien d vich bang chen Id via khu Bong Nam, cinh Nam • M90 Khe KHCNM s o 6/2012* CNKT HAM LO Thong tin khoa hoc cong nghe mo mSicpttLf 100-200m Bang M0t so chi tieu kinh tS ky thuSt ca bin cua id cho> thiet ke Cong tac khai thac: Khai Don vi Khoi Iwqvig Ten chi tiiu thac chia I6p ngang nghieng k^t TT m 6.4 Chieu day trung binh cua via hp'p VO'I chen 16 toan phan tCr 60 G6c d6c via trung binh BO du'O'i len theo huo-ng d6c 30 G6c d6c cua guong khSu 16 chp Bp Chieu day m6i 16'p khong 16'n m 120 Chi^u dai theo phuang cua cdt khai thac han 3,5m (thi^t k4 chpn chi^u m 60 Chi6u dai theo phu'ang mOt canh ciia cOt cao 16 chp' 2,2m cho phCi hp'p 6,4 vo'i dieu kien cac mo ham 16 Chieu dai gu'ang k h i u Id chp Viet Nam) Vipc khai thac T/m' 1,65 Trpng lupng th^ tich cua than moi 16'P du'p'c tien hanh nhu" 1,0 m Tien dd khai thac mOt chu ky sau: Tiy bien gio'i hai canh cua 265 San lupng than mOt chu ky T/oky cpt mo" 16 cup khai diem cua 59 T/ca 10 san lupng 16 chp trung binh mpt ca 16'P (16 noi giCra 16 dpc via v | n 11 San lupng khai thac 16 chp d6m 178 T/ngd tai bam try vai 16 thu'p'ng cpt 450 T/thang 12 San lupng khai thac mot thang thong gio bam vach) Sau do, T/nam 53 400 13 C6ng suat 16 chp khiu dgt 16 chp' tCr bien gio'i v^ 66 ngupi 14 So c6ng nhan 16 chp mpt d6m Trung tam cOt Chleu dai dogn 2,7 T/c6ng 15 Nang suat iao dpng tryc tiep 16 chp' cua lap thupc vao Kg/1 COOT 209 Chi phi thuoc no cho 1000 tan than chieu day via, goc doc 16 chp' 16 044 Cai/1000 du'p'c xac dinh phy thupc chinh 17 Chi phi kip no cho 1000 tan than 16 than 4,6; vao phu'ang phap chen 16 Thiet 18 Chi phi mat 16 chuan bi m/IOOCT 16 aa 3,4 ke chpn phu-ang phap chen 16 37 m=/1000T Chi phi g6 cho 1000 tan than 19 bang thuy lye, do, g6c 665 m»/1000T nghieng cua 16'p 30°- 35° Khiu 20 Chi phi cat lam vat lieu chen m»/1000T 997 gyang bang cong nghe khoan 21 Chi phi nu'ac 11,0 no min, chong giu- khong gian 22 Ton that Chung 16 chp" bIng vi ch6ng g6 Trong mpt chu ky, sau khai thac a cac dai khau tiep theo, than chCra nyac, sau dtrac bam ch6ng giu" 16 chg, tien hanh dyac d6 xuong thypng van tai len mat bang muc +30 d i b i c6ng tac chen 16 V^t lieu chen qua 16 dpc via -80 r6i dya sung cho he thing cap vat lieu du'p'c chuan bj ti> ngoai mgt ngoai Vat lieu chen dypc chon chen bang du'a qua hp thdng dan v^t la cat dypc dya qua 16 thypng Kit qua tinh toan kinh t i sa li$u bang du-ang 16 cua mi>c da, 16 dpc via da ±0, qua cup bp che thay: gia san xuyen via ±0, 16 thypng thpng phim tinh thep cong nghe la: th6ng gio, qua 16 thu'p'ng thong 1.470.000 d/tan, lan han gia gio cua cpt vao chen 16 chp' gio cua cpt d i vao i6 chp Cong tac th6ng gio: Gio san pham theo k i hoach Sau chen xong, hinh 16 thu'p'ng v|n tai cua cpt, t^o sach tir 16 dpc via da qua cCip nam 2012 cua Cong ty than xuyen via, 16 dpc via myc -80, Mao Khe 1.220.488 d/tin va du'6'ng 16 van tai mai cho khIu lap tilp theo Trong dieu ki$n qua thypng van tai ien thong tyang dyang vai gia ban than da vach via mem y^u, thi^t ke gio oho 16 chp Gio thai theo 16 binh quan 1.465.441 d/tan dpc via thong gio cua lap, chpn bu'ac chen t i j - 6m M6t $6 chi tieu kinh te, ky Cong tac van tai: Than khai thyang cpt thong gio, qua cijp thuat cua 16 chp thiit k i dypc thac tu- guang 16 chp' m6i lap ty va 16 doc via da ± 0, ngoai trinh bay bang Cong tac thoat nuac: Nyac tryp't tren nen 16 xuong mang Nhy vay danh gia dieu kien cao 6' 16 dpc via van tai cua Ip'p khu khai thac dyac chay dia chit cac via than khu vyc dai dau tien than dyp'c qua 16 dpc via van tai I6p, canh Nam, mo Mao Khe che chuyen qua 16 song song, qua thupng van tai, 16 dpc via myc thiy, phan trO lypng than nim 16 thu-png noi xu6ng 16 dpc via -80, -80, cup xuyen via, ve ham % KHCNM S 6/2012* CNKT H X M LO Thong tin khoa hpc e6ng nghg m6 dyoi cac ccng trinh c i n bao v# tren be mat la rit 16'n Theo kinh nghlem khai thac cua nu&c ngoai, Vi0n Khoa hpc C6ng ngh? Mo da nghien c y u lya chpn mpt s6 loai hinh c6ng nghe khai thac d i i u khiln da vach bling phyang phap ch6n 16 d i khai thac p h i n trii' lyQ>ng Qua k i t qua tinh toan, thiit k i cu t h i d i i u ki$n via cho thiy, vi$c ap dyng cong ngh0 khai thac d i i u khiin da vach b i n g phyang phap ch6n 16 toan p h i n d i hda, cdng trinh cdng nghi$p va khai thac p h i n trir lyp'ng than dSn dung", Vi$n Khoa hcK d y i cac c6ng trinh c i n bSo Cdng ngh$ Md - 2011 v$ tai khu canh Nam se aim npunoxBHUH K TexHonobao kha nSng huy dSng tai au^ecKUM cxerviaM paspadomiw nguyen va aim bio an toan yao/rbHbix nnacmoe cucmecac c6ng trinh c i n bSo v$ trSn f^aMU c 3aKna6Kou ebipaSob i mill maHHoao npocmpancmea, i npOKOrrteecK - 2007 Til ll^u tham khio B4 tii (30c l$p dp Nhi l^HfpopivtanoHHbie conLrdc 'Nghien ci>u lira chqn cic ObUtenun u npedeapumenuibie giai phip ky thu$t vi cong ngh$ npednoKBHUft no opaaHusaituu h(?p ly dS khai thic than d cic aaKnado^Hbix pa6om na khu vi/c c(i di tich Ijch sir vin waxme "Mao -Xe" -2012 DE XUAT XAY DUNG PHU0NG PHAP XAC DINH HAM LUtTNG KHJ DOC (Tiep theo trang 33) - Dieu kien thCr nghi^m: thu nghlem c6 dung bua, kh6ng dung bua, thCr nghiem moi tru'ang c6 metan a m(rc dp cho phep mo him 16 Theo do, Quy trinh thLr nghiem 6irac Qh xuat, nhu* sau: Xac djnh cac dieu kipn nhiet dp, ap suit tru'6'c thu" nghipm, Nap thuoc, nap bua Nap metan va ki^m soat ham lu'p'ng theo yeu c^u Tien hanh phat no khoi thuoc thii' nghipm Do dgc cac thong s6 nhl^t d6, ap suat buong thLf nghiem sau phat n6 Lly m l u thong qua hp thong dy6'ng ong lay m i u Phan tich ham lu'p'ng khi, tinh toan cac thong so lien quan Bao cao ket qua thu" nghipm K6t luan Viec xay dyng quy trinh va yeu cau thu' nghlem lyp'ng dpc sinh sau nd cua thuoc n6 ap dyng tgi Vipt Nam hoan toan co the thyc hipn duyc, dya tren cac tieu chuan hipn hanh da du'p'c Ccic nu'O'c dang ap dyng Dilm quan trpng phu'ang ph^p thu' nghipm la vipc xac djnh nguyen tac va di^u kipn tinh toan nhdm du'a thong s6 chinh xac v^ ham lu'p'ng cung nhy t h i tich lyp'ng dpc sinh tu- kh6i thuoc n6 thy nghipm V&i c^c thiit bi da du'p'c trang bj nhy may sac ky khi, h# thing sensor khi, hp thing lly m l u va can bang nhipt dp hoan tpan dap u'ng cac yeu cku cho thy nghiem V l ca sa thi> nghi#m, tren I P lai thy nghlem nh^m ' ca SO' hp thing thy nghlem xac djnh chinh xac cac thong s6 hipn c6, cIn thiit phai cai t^o, KHCNM SO 6/2012" CNKT HAM LO b l sung m|t s i trang thilt bj chuySn dyng khac se hodn to^n dap yng du'p'c yeu ciiu thu' nghipm xac djnh lu^ng dpc sau n l min./ Tii li^u tham khio: Japan Explosives Society, Industrial Explosives Handbool(, KYORITU SHUPPAN Co Ud 1966 Richard J Mainiero, A technique for measuring toxic gases produced by blasSng agents National /nsWuteforOo cupational Safety and Health (NIOSH), Pittsburgh Research Center Pittsburgh, PA Richard J Mainiero, Matda L Hanis, and James H Rowland III, Dangers of Toxic Fumes from Blasting NIOSH-USA CFR (Code of Federal Regulations) of USA, Tide 5P-' Afffnera/ Resources, part 15- Requirement for approval of explo^ve and sheathed explosve units Standard of EU 13631-16 'Detectiai and measurement of toxic gases - Method fr^ quantification of NOx and CO produced by the detonation of explosive for use In underground work" ... Vien KHCN Mo de xuat cac sc cong ngh? khai thac cho cac khu vyc via than nam du''O''i cac c6ng trinh can bao ve cua khu canh Nam mo Mao Khe, nhu-sau 2.1 Doi vdi khu v{pc via c6 chieu day (Ten 3,5m,... xult tren Cac loai hinh cong nghe khai thac deu co tinh kha thi cao ve mat ky thuat Tuy nhien, doi vai cac via than khu vyc canh Nam, cac khu vyc khai thac cac via than du-ai cac d6i typ''ng, cong... hoach s5n lupng ciJa Cong ty than Mao Kh^ nam 2012 va c i c nam t i l p theo, Vien KHCN Mo th6ng nhit cijng Cong ty than Mao Khe chon via mi>c -80/lp via cua khu Bong Nam I (vi tri TVIIa) d^ tinh