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T h o n g t i n khoa hoc cong nghe m o TINH TOfiN, LCTfi CHON GIfil PHfiP t)fiM BfiQ ON DjNH bd t r u via 13 1 itio than Tay ]\aiti Da Ma i In recent years, many research works have been implemented f[.]
T h o n g tin khoa hoc cong nghe m o TINH TOfiN, LCTfi CHON GIfil PHfiP t)fiM BfiQ ON DjNH bd t r u v i a 13-1 itio t h a n T a y ]\aiti D a M a i THS 0 NGOC TLfdC KS LE XUAN THU KS VU DINH TRUONG Vien Khoa hgc Cdng nghe Mo - TKV In recent years, many research works have been implemented for selecting solutions to ensure the stability of the high sides, especially the mine slopes, of which is the method for strengthening the rock mass In this paper, the authors refer to the solution for ensuring the stability of the slope at coal seam bf13 -1 in Tay Nam Da Mai coal mine based on this trend I Cac giai p h a p c u d n g khoi da b d m d gia Ket qua nghien eufu trUpt Id bd tru via 13-1 da xac djnh nguyen nhan trUpt Id bao gdm eae yeu td tii nhien nhU eau true dja tang, ti'nh ben virng, dac ti'nh chufa va tang trur nudc dia tang bd md Cac yeu td edng nghe nhu eae thdng sd eiia he thd'ng khai thac khdng phu hpp, chieu eao bam tru lien tue vUpt qua chieu eao dn dinh gidi han cho phep Co che trUpt Id xay tren toan bd theo hai co che trUpt sau theo mat Idp tru via 12 va trUpt tach Idp tang da bdt ket be mat De dam bao dn dinh cho bd md cd the nghien ciiu ap dung cac giai phap sau: ddc da va tUdng cac hd dao sau, da't bd rdi, phuc hdi cac cdng trinh nhu kenh dao, be boi, hd chura xudng cap va hu hai Be tdng phun dae biet ed hieu qua sii dung nang eao dn djnh eae edng trinh ngam va thudng ket hpp vdi ludi thep, bu Idng trudng hpp dae biet ed the ket hpp vdi khung thep nhe, la vat lieu eO ban thi cdng dUdng ham kieu mdi (NATM ) * Cd hai phuong phap phun be tdng, phun khd va phun Cot lifu kh6 xi mang, piiu gia tang b4n nhanh Nir6c_ ^^ Khi nen_ „_ B§f6ng tron i/6t Gia cudng khoi da be mat bang be tong phun Phu gia tang ben nhanh long Khi nen # ^^^Mui phun ^T Be tdng phun bao gdm eae cd't lieu mjn hoae thd (cat, da dam ) cung vdi xi mang, nude, ddi them cac chat phu gia de ddng cung nhanh hoae de eho dd phun (Lorman -1968, Poad va Serbousek -1972, Reading-1973) Be tdng phun dupc ufng dung rdng rai de nang cao dn djnh cho cac bd Udt Trong phun khd ( hinh 1), cae ed't lieu thd va cung vdi xi mang va ddi vdi bpt ddng eiing nhanh, 6dgc bdm bang nen dieu kien khd hoac niia khd qua d'ng cap lieu Nude 6dgc bd sung d dau vdi cap lieu trUde be tdng phun Trong phun Udt (hinhl), cae phan khd va Udt dupc trdn trUde vdi bom vao dng cap lieu Cap phdi cd't lieu tieu bieu ciia be tdng phun dUdc the hien tren hinh 2 Xi mang hoa sau T^ r b) Betdng tr6n Udt \ Bom belong , Phu gia tang ben nhanh long Mk khf nen J , _ I c) Hinh Cac phuang phap phun be tdng a Phuang phap phun kho, b Phuang phap phun udt dung nen, c Phuang phap phun udt dung bam be tong KHCNM SO 6/2010* CNKT LO THifiN Thong tin khoa hoc cong nghe m o thude vao dieu kien dja ky thuat eiia khu viie can gia cudng, ngudi ta chpn loai may khoan khf nen hay khoan xoay, khoan dap, dudng kfnh Id khoan tit 50 den 300mm, chieu sau Id khoan tU 15 de'n 100m Thie't bj bom phut gdm: may bom, may trdn dung djch, eae d'ng dan, ddng hd ap lue, thie't bj can sang Ipc xi mang Hien nay, ngudi ta ap dung phd bien nhdm so 66 khoan phut chu yeu: So 66 dupc thiic hien qua cae Id khoan tU mat da't, han ehe ciia so 66 la tdn hao dung djch Idn Min Trung binh Tho Min Tho Trung binh 0,06 0,2 0,6 khd'i da ed eae he 20 60 khe niit thing dufng; So 66 thii Hinh Cap phdi hat tieu bieu eua edt lieu be tong phun Be tong la bom phut dupc thiie hien phun kho, vdi edt lieu thd tron canh hudng tdi dudng eong thap, be tong udt va cdi lieu da nghien hudng tdi dudng eong tCr cac hd khoan, khoan tCf cac gieng dumg Idn, uru diem cCia eao (mjn han) so 66 la dat 6\jgc chieu Xi mang hda sau la bOm Dung djch xi mang dOn gian la phut dung djch xi mang lap xi mang + nude Dung djch xi sau xi mang hda Idn ca day cac Id rdng, khe nurt eCia mang phiTc tap la xi mang + cac tang dat da cd tdn tai dat da dudi ap lue bom phut nude + cac phu gia Tfnh chat, cae khe nut thiing diing nha't djnh thdng qua eae Id ty le pha trdn va dac tfnh ciia De tie'n hanh bom phut can khoan hay gieng dung nham dung djch xi mang sii dung tang cudng dp ben, kha nang bom phut xi mang hda sau xae djnh eae thdng sd chii yeu: Khoang each gid'a eae Id chiu tai va ngan chan ddng dupc tdng hpp bang khoan (R), luu lupng bom phut ngam, nang eao dp dn djnh Phuong phap xi mang hda (Q), ap lue bom phut (P) Theo ciia bd md, giam he sd tham sau mang lai hieu qua eao nude eua da't da phan bd sau [10] eae thdng sd lan lupt bom phut nen da dja tang Dung djch xi maema, da bien chat va da 6\jgc xac djnh theo cac cdng mang bom phut ditgc chia lam tram tfch ciing nuft ne Tuy thufc sau: hai loai, don gian va phure tap Bang - Dae trung eua dung djch set - xi mang Ty le theo iUdng Xi mang Poclant Max 300 Set Nirdc 0,95 0,97 0,90 1,00 0,95 0,98 Phu gia Gael % theo ludng 2 KHCNM SO 6/2010* CNKT L T H I £ N Ty dung djch g/cm' 1770 1740 1770 1688 1660 1700 Thdi gian ngung ket Bat Ket dau thue 2*^00' IS'-OO' 2^00' 18*^00' 1*^30' 11" 00' 2" 20' 1"0"00' 2M0' 10" 00' 10hOO' 1h40' Gidi ban ben nen kg/cm^ Sau Sau ngd ng.d 40 72 30 82 15 106 12 46 18 60 20 65 Thong tin khoa hoc cong nghe m o dung dpc lap hoac phdi hdp vdi cac giai phap khae nhu be tdng phun, xa thep, ket cau chdng giur bang be tdng Hien nay, de ehdng giur mai dd'c, gia eUdng khd'i da bd md ngUdi ta ap dung phd bien hai loai neo: neo be tdng edt thep va neo chat deo edt thep (a) Kieu A (b) Kieu B (c) Kieu C (d) Kieu D Hinh Cac kieu neo be tdng cot thep Bang Dac tinh ky thuat cua neo chat deo TT Don vl Ten chi tieu Ci/dng dp khang nen Mo dun dan hoi Ciidng khang keo Li/c dfnh nen Thdi gian tron chat deo Thdi gian dong ket Di/dng kinh thoi chat deo Chieu dai thoi chat deo + Khoang each giura cae Id khoan: IH 2Kl (m) R + LUu lupng bom: Gia trj 65+75 6,5+8,3 73+92 1000 8 25 1200,600 Mpa Gpa KN N/mm Giay Giay mm mm dat da (m/ng) ,L '-' t - Thdi gian van ddng eCia dung djch xi mang khe nurt eiia da tren doan R (ng) H - Chieu eao edt ap bdm phut (m) r - Ban kfnh hd khoan (m) -^iP«_-3^_SCR 1.7t.a (m% Q= Ln' +Ap luc bom phut: P = ''"•^(a.).' 10 n Trong dd: k - He sd tham nudc cua |ii, ]X2- Dp nhdt ddng hpc ciia nude va dung djch xi mang n - Dp rdng huU hieu cCia da Neo Sii dung neo de dam bao dn djnh eho mai ddc da hoae cac hd dao ngam la giai phap phu hpp ddi vdi hau het cac loai da Tuy theo dieu kien quy djnh, neo ed the suf KHCNM SO 6/2010* CNKT LO THI£N + Neo be tdng ed't thep Phu thude vao kha nang khang nhd mang tai eCia neo, CO ehe truyen iing suat tCr bau neo sang da bao quanh quyet djnh dang hinh hpc eiia neo Cae dang neo be tdng cd't thep 6\iac phan loai the hien tren hinh Neo kieu A gdm dng treminne, than Id khoan thang diing dUpc phun vCfa bao hoac vd, nd ed the thang tam thdi hoae khdng thang thude vao sU dn djnh eiia Id khoan Kieu 6dgc dung phd bien da va rat dn djnh ddi vdi da eufng Sufe khang nhd phu thude vao ma sat ben tai giao dien da - vu'a Neo kieu B gdm cac lo khoan 6\jgc phun vOra ap liic thap (ap lue phun vOra tieu bieu Pi < 1000 k N / m ^ - Kieu neo dung phd bien da yeu nut ne va eae Idp hat thd, nhung cung kha phd bien da rdi hat mjn Sure khang chiu nhd phu thudc vao siie khang eat ben thiic te,nhung phan siic khang mui cung ed the ke den tfnh toan sure chju tai gidi han Neo kieu C gdm eae Id khoan dupc phun vOra ap liie eao ( Pi> 2000 kN/m^) thdng Thong tin khoa hoc cong nghe mo qua mdt dng hoae mdt bao tai chd Bau neo dupc md rdng tao chum re da nham tang cudng siie bam dfnh eho bau neo Kieu neo 6dgc sii dung phd bien da rdi hat Thiet ke diia tren eo sd gia thiet ve ufng suat tiep khdng ddi dpc theo bau neo Neo kieu D gdm cac Id khoan 6dgc phun vCra bang d'ng tremine, dd cd mpt loat chd phinh rdng dang hinh chuong hoae hinh bau 6dgc tao sin tu trudc Kieu 6dgc sit dung phd bien da ket dinh tu chat den ciing Siie khang chju nhd phu thude vao ma sat ben va siic chju d mui + Neo chat deo ed't thep Thudc loai chju liie chii ddng, sii dung neo chat deo edt thep chdng dd sau dugc lap dat vao Id neo, nhd SLf ddng ran nhanh eua chat deo da tao lien ket eae Idp da bao quanh mdt khdi, chdng lai ap lUc gay nen sii pha hijy eiia da't da, vay neo ludn lam viee d trang thai keo ddi lam viee d trang thai eat LUe cang than neo lap dat ludn dam bao Idn hOn tai trpng tac dung len cae Idp da bao quanh de ehdng lai hien tUpng tao ndi ufng suat da vUpt gia trj gidi han eho phep lam bien dang gay mat dn djnh, mat kha nang lien ket giura cae Idp da Lue cang than neo dat gia trj tdi thieu de chdng lai tii trpng ciia khd'i da va ap luc md, giur cho khdi da bao quanh khdng bj bien dang hay bj tach Idp, dam bao sU dn dinh eho edng trinh Neo chat deo ed't thep gdm hai phan Idi neo bang thanh, cap, che tao tCr loai thep dac biet, vd ngoai 6[igc bpe bang chat deo cd hai tde dp ddng Cling khae dUde chia theo ty le thfch hpp Khi tien hanh neo, thdi chat deo bj pha vd vd bpe ben ngoai, hai loai vat chat 6dgc trdn vao tao phan LJng hda hpc bien chat deo mdt loai lien ket kien ed Cae thdng sd co ban ciia mdt loai neo chat deo dien hinh Nhat Ban ehe tao 6ugc neu bang li Lira chon giai phap dam bao on djnh cho bd tru via 13.1 Truptid bd tru via 13.1 xay theo co ehe trUpt phang theo mat Idp, nguyen nhan trUpt 6dgc xac djnh chieu eao ciia bd vUpt qua chieu eao dn djnh gidi han eho phep tao gde dd'c cCia bd bang gdc ddc mat Idp De dam bao dn dinh eho bd tru da tien hanh tfnh toan liia chpn eae giai : phap sau: - Giai phap thur nha't: Ha tha'p gde dd'c eua bd md tU 35° xud'ng 25" bang viee eat tang vao tru d eae mufc +180, +130, +80 Khi dd khd'i luong xii ly tdng the la: 4.490.000 m^, Vdi giai phap dp dn djnh ciia bd 6dgc dam bao vdi he sddn djnh n =1,2 - Giai phap thuf hai, tha'p gde ddc eiia bd tCr miie +180 trd len bang viec cat tang vao tru ket hpp neo tCr mufc +100 den miic + 40 Vdi giai phap khdi lupng xii ly : Da't bdc -1.684.878 m^; Neo 5720 m He sd dn djnh eiia bd n = 1,17 KHCNM s d 6/2010* CNKT LO THI£N Ket qua tfnh toan chi phf xii ly eho thay theo phuong an tdng mure dau tu 182.025 trieu ddng, vdi phuong an miic dau tu chi bang 88.006 trieu ddng NhU vay, chi phf xii ly theo phuong an ehi bang 48,35% phuong an Do vay phuong an dupc uu tien liia chpn de xii ly trupt Id, dam bao dn dinh cho bd tru via 13.1 ill Ket luan Trupt Id bdtru via 13.1 xay theo eO che trupt phang, mat trUpt la tru than via 12, phan bd sau hOn be mat bd md tu 20 de'n 25 met Nguyen nhan trupt Id eua bd dupe quyet djnh bdi chieu eao thiet ke bam tru lien tue Idn hOn chieu eao dn djnh gidi ban eho phep theo dieu kien dja eO md eCia da't da eau tao bd tru De dam bao dn djnh eho bd tru, giai phap 6dgc liia chpn la thap gdc dd'c d phan tren ciia bd tu mufc +180 trd len bang viec eat hai tang vao tru ket hpp neo tu miie + 40 den +100 Tai lieu tham khao •' • Bao eao ket qua nghien eufu de tai" Xac djnh nguyen nhan trupt Id va thiet ke giai phap dam bao dn djnh bd tru via 13.1 md than Tay Nam Da Mai"- Le Xuan Thu - Vien Khoa hoc Cdng nghe md 2009 On djnh bd md va bai thai Giao sU tien sy Phixenkd Nha xua't ban Nhedra-1965 Hudng dan nghien eufu va tfnh toan dn dinh bd md than Id thien Viet Nam - Le Thong tin khoa hoc cong nghe mo Xuan Thu - Vien KHCN Md- "Nghien eiiu theo doi thii nghiem vi neo chat deo cd't 1992 Bao eao tdng ket de tai thep cua iJc tai Cdng ty than "Nghien ciiu xae djnh nguyen Udng Bf - Vien Khoa hpc nhan trupt Id bd tru via 14 Bao Cdng nghe Md -TKV Ha Ndi Gia " - Le Xuan Thu -Vien 1995 Khoa hoe Cdng nghe Md Bao cao tdng ket de tai Nam 2002 "Nghien ciiu ap dung thii Bao eao tdng ket de tai" nghiem chd'ng Id dpc via than Nghien euTu xii ly trupt Id bd tru bang vi neo chat deo cd't thep Nam khoang sang Bang Nau- Nhat Ban tai md than DUOng Cdng ty Ddng Bae" - Le Xuan Huy - Quang Ninh" - Vien Thu - Vien Khoa hpc Cdng Khoa hoe Cdng nghe Md Ha Ndi - 2005 nghe Md Nam 2005 Bao eao de tai "Nghien Bao cao tdng ket de tai curu edng nghe va ap dung thii nghiem phuong phap gia cUdng dat da yeu phuc vu edng tae eo gidi hoa dao Id va khau than d eae md ham Id" TS Pham Minh Diie - Vien Khoa hoe Cdng nghe Md Ha Npi - 2005 Dat xay diing, dja chat cdng trinh va ky thuat cai tao dat xay dung - Nha xuat ban Xay diing - 2005 10 Neo dat - Nha xua't ban Xay dung Ha Ndi 2008 KINH NGHIEM KHfii THfiC LQ THIEN CfiC Vlfi THAN DOC t a i mo luive (Indonesia) In this paper, the author will focus exactly on Sanjay Singh, describing to the readers the development of new Giam ddc md than Luwe mining methods for steep and high grade coal seams (Cdng ty Victor Dua Tiga Mega, Indonesia) in Indonesia and all around the world and for the recommendation towards some changes in mining strategy for the recovery of high grade coal as well I Gidi thieu chung Theo bao cao tham dd trur lupng dja chat, trur lupng than tai Indonesia hien vao khoang 6,97 ty tan (chiem 0,5% tdng tri/ lupng tren toan the gidi) Khoang 83% tdng trur lupng la than linhit va ban bitum, 17% cdn lai la than chufa bitum va than antraxit Indonesia la nude san xua't than diing thii va xuat khau than dufng thuf tren the gidi Vdi tde dp khai thac va tieu thu nhu hien nay, trCr lUpng than tai nUdc chi cd the sii dung 37 nam nu'a, neu khdng md them md mdi Than ciia Indonesia cd ham lupng tro va lUu huynh tha'p, nhiet nang cao, rat phu hpp cho san xua't dien hieu suat eao va ft gay d nhiem Vi vay, khoang 77% than eiia Indonesia dugc xua't khau sang eae nude nhU Nhat Ban, Han Qud'c, An Dp, Philippines, Viet Nam, Dai Loan va Trung Qud'e Hau het cae khoang sang than tai Indonesia gdm nhCirng via ddc dufng, chat lupng eao nhung nam eae dieu kien mdi trudng, dja chat, dia hinh rat phufc tap Vi vay, viec thie't ke, xay dung va khai thac md ed quy md lau dai la rat can thie't, dac biet la ddi vdi cac via than dd'c diing II Mo than Luwe PT Victor Dua Tiga Mega la mdt cdng ty khai thac than tu nhan tai Indonesia Mdi day, Cdng ty 6[tgc giao mdt KHCNM SO 6/2010* CNKT L O THI£N khu da't 3464 tai khu viic Central Kalimantan de tham dd va khai thac than Trong qua trinh lap quy hoach va thiet ke md, Cdng ty da dac biet quan tam de'n nhung van de: dp dd'c via, chieu sau via, chat lupng than, liia chpn phUdng phap khai thac, liia chpn thiet bj khai thac, bien gidi khai thac, he sd bdc gidi han dUa tren chi phf san xua't va gia ban than dii kien, quyen sii dung dat eho khai thac Mue tieu la tan thu tdi da ngudn tai nguyen than tdi dp sau tdi han, dd la gidi han khai thac ma chi phf khai thac thap hon so vdi gia ban san pham, tri tai nguyen than, dam bao phat then ben vung ... thue 2*^00'' IS''-OO'' 2^00'' 18 *^00'' 1* ^30'' 11 " 00'' 2" 20'' 1" 0"00'' 2M0'' 10 " 00'' 10 hOO'' 1h40'' Gidi ban ben nen kg/cm^ Sau Sau ngd ng.d 40 72 30 82 15 10 6 12 46 18 60 20 65 Thong tin khoa hoc cong... 0,90 1, 00 0,95 0,98 Phu gia Gael % theo ludng 2 KHCNM SO 6/2 010 * CNKT L T H I £ N Ty dung djch g/cm'' 17 70 17 40 17 70 16 88 16 60 17 00 Thdi gian ngung ket Bat Ket dau thue 2*^00'' IS''-OO'' 2^00'' 18 *^00''... xii ly trupt Id, dam bao dn dinh cho bd tru via 13 . 1 ill Ket luan Trupt Id bdtru via 13 . 1 xay theo eO che trupt phang, mat trUpt la tru than via 12 , phan bd sau hOn be mat bd md tu 20 de''n 25