JJU KHOA HOC VA CANG NGHl MD PHirONG PHAP LUA CHON MAY BOiVI NlTGfC CHO CAC MO THAN LO THIEN SAU VUNG QUANG NINH ThS BlJI NGOC TUdC, KS BUI DUY NAM Vign Khoa hgc cdng nghg Md Vinacomin ThS BUI VAN TUY[.]
JJU_ KHOA HOC VA CANG NGHl MD PHirONG PHAP LUA CHON MAY BOiVI NlTGfC CHO CAC MO THAN LO THIEN SAU VUNG QUANG NINH ThS BlJI NGOC TUdC, KS BUI DUY NAM Vign Khoa hgc cdng nghg Md-Vinacomin ThS BUI VAN TUYEN Trwdng Cao ding nghe CN Viet Bic-Vinacomin r ac mo than 10 thidn sdu viing Quang Ninh gim Ddo Nai, Cgc Sdu, Cao Son Hd Tu, ^ • ^ Mill Bdo, Tdy Nam Dd Mdi ddng gdp sdn lugng than 10 thidn chinh cua Vmaeomm Ddc dilm chung cua cdc mo Id khai thdc theo mua' miia mua va miia khd Miia khd bdt ddu td thdng 11 din thdng ndm sau; lugng mua trung binh hdng thdng tu 30-40 mm Lugng boc hoi Idn nhit xay vao mua khO tu thang 12 din thdng Trong dd ldn nhit la 11 mm (ngay 7/3/2004) Mua mua bit ddu tu thdng din thdng 10 hang nam Cac trdn mua ldn thudng tap trung vdo thang Trong dd lugng mua ldn nhdt ngdy dat 270 mm (ngdy 8/8/1994) Lugng mua binh qudn hang thdng tu 400-600 mm, hang nam dat xIp xi 2500 mm, Td cdc sd ligu thing ke cho thdy miia mua, lugng bdc hoi thudng ed gia tri khdng ddng k l Lugng nudc ehay vdo md edn thoat bdng bom (Q) gdm cac ngudn: nudc mua (dudi mdc thodt nudc tu ehay va luang nudc ro n" tu cdc muong ranh) nude ngim (luong bde hoi khdng dang kl) Lugng nudc Q duge tinh nhu sau' Q=(Qm+Qt+Qn9), m^/ng.d (1) Trong dd Qm - Lugng nudc mdt m^/ng.d; Q, Lugng nude rd ri vd trdn qua cdc muong, rdnh thoat nudc tu cac tdng xudng ddy mo, m^/ng.d; Qng - Luang nudc ngdm, m^/ng.d Bang Lugng nucfc chay vao md theo tr$n mua lan nhit dem Di$ntlchm$t Luvng nu*c chay vSo mfi Ten mo mo, m^ ldn nhit tiong nqlydem m' Deo Nai 5.639.100 1.036.227 Cgc sau 3.599.385 705.466 - : Cao Son 6.258.900 1.289.198 ,,| CONG NGHllP MO $ - 2 Cde md than 10 thidn vung Quang Ninh co didn tich nude tryc tilp (mdt md) rdt ldn Ty dd, lugng mua eua trdn mua Idn nhit tgi mOt s l md d Bang Theo tinh todn thodt nudc mo tgi cdc Thilt kl md, cdng suit mdy bom chgn theo trinh tu chon lugng nude cdn thoat dem chgn lua lugng bom gid va chgn so bp ap lyc bam, ehung loai vd sd may bam theo cac cdng thdc •:• Lugng nude can thodt bdng bom mgt ddm (QCB): Qcb - ° mVngd (2) Trong do: Q luu lugng nudc chay vao day mo, N=5: s l bam sau mOt trdn mua *> Chgn luu lugng bam gid (Qn): Qb = ? ^ m ' / g i d (3) ^.m Trong do: m=20 Sd gid lam vi0c ng.d, ^=0,85 hiOu suit su dyng may bom •:• Chgn so bd ap lyc may bom (Hsb) H,b = ^ ^ , m (4) '1 Tai day Hhh - Chilu cao hinh hpc cin bom; r\=0,70,8 - Hd s i su dyng mgng ddn Vdi phuang phap lua chgn nhu tren, hau het eac trgn mua Idn deu dugc bom cudng buc khoi mc Cd nghTa la mo cd thi khai thdc ca mua mua Tuy nhien, dae diem hinh hoe eua cdc md than Id thidn viing Quang Ninh la: than ndm phia dudi day mo, dlt da t^p trung trdn cao Vi vdy, eae thdng miia mira, day mo khdng xuong sau Niu phuang phap tinh todn trdn se su dyng so lugng ldn mdy bam, chi phi ddu tu tri bam nudc Idn Cae md than lg thien vung Quang Ninh cang xuIng sdu, kich thudc khai trudng han chl, KHOAHOCVACONGNGH^MO thudng su dung cdng nghe dao sdu nhieu bdc, cdc md ed kich thudc khai trudng Idn thudng su dyng cdng nghg dao sau day moong elp Ddy thip hodc bdc sdu nhdt se la noi tgp trung biin, nude miia mua Thyc te, ede md thydng khing chl mgt luang nude nhdt djnh d ddy moong vd tri bom din mdc nude khdng ehe Do dd ein xem xdt, tinh toan khdu bom nude phii hgp han Ndi dung chinh cua phu'ong an xem xdt theo nguydn tde: Tgi eae day md khai thdc khdng ding thdi hdm Id-Id thidn eo thd bom elm chung miia mua va trudc 1/11 hdng ndm bom cgn tdi ddy md d l chudn b[ mua dao sdu mdi Cdc thdng s6 cdn xac djnh gdm: •> Xdc dmh lugng nudc chay vdo mo (Idn nhdt) luy tiln theo t i n suit gdn vdi thdi gian ton tai mo (Vnia,) •:• Xae dinh luang nude khdng chl tgi ddy md (thudng eho ngdp td 1-2 tdng) Vn,; _^J *:• Xae djnh lugng nudc (Vt,i), vd s l lugng mdy bam (Nl) can bom mua mua; • Xde djnh lugng nudc (Vb2) vd s l lugng may bom (Hi) bom thdi gian trude 31/10 hdng ndm Lya chpn s l mdy bom theo mye tidu Ni=N2 Trinh ty xdc djnh lugng nudc Vb2 vd thdi gian bom Vb2 dugc trinh bdy tren so H.I Trong dd: tryc tung thi hign khoi lugng nudc chay vdo md theo cpng luy tiln Vma«, tryc hodnh thd hidn thdi gian Bao gim