Thong tin khoa hpc cong nghe m o l> \/pH.AN TiCH HIEU QUA CONG TAC KHOAN N MIN THI CONG GIENG DING MO THAN HA L.\M VC(I N H C X G GIENG DtiNG TAI MOT SO MO THAN \ t ' N G QUANG NINH TS Pham Minh Din:, TbS.Lini Cong Nam, KS Nghiem Xu£n La, KS Nguyin Tri Thing Vien Khoa hgc Cdng nghe Md - Vinacomin Bien Ijlp: TS Tnnmg BOcDu T6mtit: Khoan no mgt nhirng cong dogn chinh ddy chuyen thi cong ddo chong gieng ddng, q dfnh den toe dg, ndng suat, chdt lu^g xdy dung v6 chdng giing dimg Trong bdi viet ndy cdc tdc gid ddp tich, so sdnh hieu qud cong tdc khoan no tgi cdc gieng dimg thi cong tgi md than Hd Ldm vdi nhiing gie diing khdc tai mgt so mo than vimg Qudng Ninh M i t s i v i n dd v l thj cong gidng dung n^ - s i ngdy ldm vige thdng; bdng khoan n i T ^ - S i thpi gian ldm vide ngdy Thi cflng giing dirng v6i d c cflng dogn Khi ehilu sdu l5 cdng Ifln, s i lypng ehu ehu ky tiln gypng khong khdc so vfl'i Ifl bing ky thi cong trpng thdng d n g it, s i lypng cdc Mil cflng dogn d i u b i t d i u tir phd da tgo khflng nguydn cflng khflng ldm san phim tif mil gian thing dimg cho xdy dyng v i ching Hidn cflng dogn cdng gidm, dfl, thfl'i gign sy dyng nay, g i n 100% cong dogn phd dd tgo khflng thilt bj, nhdn lye efl ieh cdng cap Vi vdy, ndng gian giing dirng trdn t h i gi6i d i u dupe thyc suit lao dflng tdng theo Song chilu sdu l i hidn bdng khoan n i khflng the tdng y Chilu sdu higu qud si> Chit lypng eing tdc khoan n i mln giing dyng Ifl id m i l tyong quan gitia didn tieh dung quylt dmh d i n t i c dfl, ndng suit, chit mdt cat gyong, dfl b i n dd Tir kinh nghidm lypng xdy dyng giing dung Nhu'ng ydu eiu dfl [3] gifl'i thidu m i l lidn hd giOa chilu sdu IS mln dypc t h i hidn nhy sau: vfl'i tilt didn gyong giing ddo vd dfl kidn c i dd (bdng 1) - Khoan Id Theo 1;^ thuylt v l khoan n i min, ehilu sdu H i ehilu khoan qui djnh s i lypng, chilu sdu, khoang cdch, dyong kinh, mgt dfl phii hpp l i mln ehi dgt hidu qua giu'a ehilu sdu l i vfl'i ddc dilm dja ky thugt, d|a co hpe eiia dd, va dyfl'ng khdng nho nhit thoa mdn sy tdi yu khii dd, quylt djnh d i n t i c d i , chit lypng thi Oyflng khdng nhfl nhit Id khodng cdch tif vj tri cflng vd chit lupng vfl ching giing, anh hyfl'ng ddy l5 efl thuie d i n b l mdt thodng cua khii dd d i n hidu qua kinh t l va gid xdy dyng nguydn Do dfl, cum l i dflt phd, dypc kich Thflng thyong, chilu sdu, s i lu'png, dupng " ^ ^^'^ • ' * " '''ong ^'i '^*^'^" " mln vdri dyirng kinh 16 dypc tinh todn dya trdn cde s i tay khdng nhfl nhit dypc tinh tif ddy l i d i n hyfl'ng ddn hogc cdc tieu ehuin xdy dyng giing "'^^ gyong giing theo phypng thing dirng Do Chilu sdu l i khoan anh hu'png d i n toe dfl, nang ^^ '"^t thodng tryfl'c cym dflt phd n i chi Id suit, chit lypng phd dd, chit lypng xdy dyng "'^^ gyong Vi vdy, d l chilu ddi dy6ng khdng vd ching giing Cfl t h i xdc djnh chilu sdu " h ° ^°^'^ ngyfl'i ta khoan Id dflt phd dgng ndm Id theo k l hogeh djnh tn/oc, vol cac,—^^"^ ' Hl(u qui ehi tidu t i e dfl ddo xulng sdu (1) [2] Oi^n tich mit cit Hisidd Chl^u siu si> ditng l6 guatng dio kiin ci l6 mln /, mln VPi gilng (3i>ng 12 0,80 0,90 2,5 3,5 S,=20-50m' Trong dfl: 1,5.-3.0 0,80 0,90 Lfl bdng vd nghidng 12 v„ - Tic d i ddo ml thdng; S,= 4-20m' 20 0,80 0,85 1,2 -.2,0 T,^- Thfl'i gian ehu ky, g i i ; KHCNM so 11M16 • CNKT HAM L Thong tin khoa hpc c6ng ngh? m o 'W vflri chilu ddi ngan vd nghidng d l khoang cdch tir ddy Id ndm d i n mdt gyong nho nhit d t h i Ho$c Id dpt phd khoan nghieng dgng hinh ndm d l ddy edc l i cdch nhgu voi khoang cdch nho nhit e i I h i (200-250mm) (hinh 1) Dfl nghidng d a Id d i t phd phu thupc vac hd s i dfl kidn d d a dd Khi dd d dfl kidn d cdng cao thi gflc nghieng edng nho hay khoang cdch ddy Id vflfi ngin (bang 1) [3) - Ngp n i Id qud trinh dya cdc thoi thuie, kip nd vdo Id min, dfl vide si> dyng cde logi thuie n i vflri ddc diem phd dd mgnh, y l u khdc nhgu, dnh hyflng d i n kit qua phd dd sau no Thuie n i cfl sire cong phd Ifln, khpang cdch Bing Hisidd kiin CO 1fl Sdlu^mg cip 16 ddt phi d^ng nim 2-4 4-6 6 6 Khtjing cich diy 16 ddt phi b, m 0.5 0.4S 0.4 0.35 0.3 0.25 (i? Gdc nghiing 16 ddt phi (a), dd 75 68 65 63 60 S8 "iS t r u y i n ni tdng T h i d u von t h u i e n i A m o n i t 6>KB khodng c d c h truyen n i t i i d a k h o d n g 0 m m Nhimg vfl'i thuie n i cfl sue cflng phd mgnh nhy Povuergei mggnum 3151, khodng cdch tmyln n i c i t h i Idn d i n 200mm Khi cdc thii thuie cdng g i n nhgu thi kha ndng truyin n i edng tit Song cdc thfli thuie b i tri khflng d i u trdn todn bfl ehilu ddi l i min, tdp trung tgi nua dyfli cung cug Id min, phlu nd hinh ndm sd phd huy dd bidn lfl ldm tdng mirc dfl "lem"[2], [3] Cdc l i bidn sir dung cdch ngp phdn dogn Id hinh thirc thay t h i cdc thoi thuie bien du'ong kinh nhfl Vide ngp phdn dpgn la lypng thuie b i tri cdc Id bidn nho hen cdc Id phd (chi bdng nira hodc 2/3) ndn d l rdi d i u tren todn bfl chilu ddi Id, d c thfli thuie phdi ddt cdch mflt dogn efl t h i Hay phdn dpgn Id d l thuie nd lip diy t d n b i chilu ddi l i mln Htnh Hd chiiu khoan ni giing dimg Co t h i dp dung vi sai theo l i , vi sal theo hdng, theo vflng hay theo cym [I) Lypng thudc nd Id dypc ngp eho l i p d i y todn b i chilu ddi, trif phin ngp bua theo qui phgm Chilu ddi l i p d i y thuie n i dflng vgi trfl rit quan trpng Theo ly thuylt n i [1], lypng thuie nd tdp trung trpng l i dgng d u , qud trinh n i sd tgo phdu n i Mgt d t phlu n i cfl dgng tam gide vfl'i gflc ddy la gflc nhpn hay gflc til phu thufle vdo sy tdp trung eua thuie n i vd ndng lypng n i Khi sy dyng vi sai theo Id, eiing mpt Id, phin g i n midng l i n i trudc, phin ddy l i n i chdm mflt phin nghin gidy nhit djnh, dfl, hidu qud phd dd se cao, bidn lfl se phdng (nlu phdn dogn bidn) Thuie nd b i tri dpc theo ehilu ddi l i min, qud trinh n i sd ldm dd khflng ehi VO d i u hon It gdy hifln typng qud cd thdnh Ifl phdng, it m l p mo hon Phdn tich hl^u qua khoan n i mln thi edng g l l n g dirng tal vung mo Quang Ninh Tif ndm 2009 vd sau dfl, ndm 2012, hai mfl khai thde than bing cflng nghd h i m Ifl tgi viing mo Qudng Ninh dd tiln hdnh thi cflng ddo sdu gilng dimg, vfli diffl'ng kinh dimg tu' 5,0 d i n 6,5m O l phd da, t i t d cde gilng ndy d i u sif - Kip mln Id m i t thdnh phin qugn trpng quylt dung khoan n i Phypng tidn mdy mflc, thilt bj thi cong tgi cdc gilng d i u typng ty nhy dinh d i n chit lypng vd hidu qud n i Si> dung kip vi sai d l edc vflng n i hinh thdnh nhau, cdc nhd t h i u xdy dyng khdc nhau, tif edc mdt thcdng cdc vflng n i e i sy chdm n i Ucraina vd Tmng Quie Khoan id sif dyng cdc khoan ehiim (BVKC - 1MA) mdy bic xiic khdc 6c: KHCNM S6 11/2016 • f NKT HAM L Thong tin khoa hoc cong ngh? mo glu nhflp (KC - 2Y /40) tgi gilng dimg Niii Beo hay gidn khoan SJZ, 5,5 k i t hpp YGZ-70, mdy bic xuc g l u nhflp HZ-6 vdn tai bdng thiing tron dung tich 3m' vd d e thiit bj tfli tnjc d cflng suit SU' dung tyong du'ong giu'a cdc gilng v l cde logi thilt bj thi d n g cho thiy s y phu hpp v l d n g suit, tinh ndng hogt ding vd tinh ndng dilu khiln 2.1 Kit qui khoan nS mln thi cdng giing (fiing md than Hi Lim theo bio hoin cdng Bing Thdng si hd chiiu nS giing gU Hi Lim [4] Tin chi tiiu TT OirPng kinh gilng Oifpng kinh gieng ddo Didn tich gilng ddo Dfl kidn cfl d t dd Kip no Thuie (F 32mm) 6 Don vi So lutfng m m m^ f F5,0 F5,8 26,42m2 6-8 m/cufln 0,4-0,7 Ghi chu Visai Thuie nd cflng phd T220 Bing Bing tham s6 nd mln thi cdng qua doan di gic giing gid Bfl Lugmg Difdng ring nl6 Gflc Tin siu 16 kinh lugng khoan nghiing lo, Vdng khoan, napd6 vdng, nfp, /vdng (•) mm kg/l6 m kg 3800 4,5 90 F1,6 27 12 3600 3,75 90 F3,0 45 17 3600 90 F4,4 61 30 3600 2,75 90 F5,6 67,5 Ting 65 190,5 Khoing cich lo vdng, mm 800 776 808 585 77ll> tv ni II III IV Phtfong thUc diu diy s.song s.song s song s song Bing Hiiu qui nimin giing gid sir dgng chiiu siu li mln 3800 mm Hi Lim TT Chl tiiu n6 mln Hidu qud phd l i hay hi$u qud sir dgng Don vl Si/ifpng % 90 Chilu ddi tiln girong m Khii lupng dd sau mdi chu ky n i Lupng tidu hao thuie n i sau mil chu ky Lu'png tidu hao thuie n i trdn don vi Lupng thuie n i cho mflt mdt gilng m» 3,24 85,6 kg kg/m' kg/m 190 2,23 58,8 Bing Tham si ni mln thi sdng qua doan da gdc giing gid Tin Vdng Ddsiu nl6 16 kht>an khoan, /vdng mm 12 17 30 Ting 65 4200 4000 4000 4000 Lutfng mln nap/l6 kg/l6 Gflc ngttiing 16, 4.2 3,5 2,8 1,75 90 90 90 90 k l l C N M S < i l i ™ i * C N K l 11VM1.6 (') Dirimg Mnh vdng, m F1,6 F3,0 F4,4 F5,6 ring lutfng niP, *9 25.2 42.0 47.6 52.5 167.3 Khoing cicit l6 vdng mm Thir tw ni Phuong th(K diu diy 800 776 808 585 II III IV s.song s.song s.song Thong tin khoa hpc cong ngh? m o W Bing? Bing htiu qui ni mln giing gid chiiu siu li mln 4200 mm Hi L im TT Silu^g Danvi Chl tau no Hidu qud phd l i hay hidu qua sir dgng % 90 Chilu ddi tiln gifcmg m 3,6 Ktiii lifpng dd sau m i l chu ky nd m' 95.1 Lifpng tidu hao thuie nd sau mdi chu ky kg 167.3 Luvng tidu hao thuie n i trdn don vi kg/m' 1.76 Lupng thuie n i cho mflt mdt gilng kg/m 46,5 Lupng tidu hao kip n i sau m i l ehu ky cdi 65 Lupng tidu hao kip n i eho m i l m' dd edi/m' 68 Lupng tidu hao kip n i cho m i l m gilng cdi/m 18,2 Bing Bing tham si ni mln thi cdng qua doan di gic giing phg dudng ktnh 7200 mm Oifflng Unh vdttg, m ring /if^ng nfP, kg 90 F1,6 25.2 90 F3,06 42.0 28 90 F4,52 4000 2.8 90 4000 1,75 89 Tin Vdng nl6 kiman Ardng Ddsiu 16 khtjan, mm Ltfpng mln n9p/t6 kgd6 Gdc nghiing 16, 4200 4,2 12 4000 3,5 18 4000 23 38 Ting 97 (') Khoing cichli vdng mm Thir tw ni Phuong thiK diu diy 800 s.song 792 II s.song 504 785 III s.song F5,98 644 814 IV s.song F7,2 65 595 V s.song 248.5 Bing Bing hi$u qui n6 mln dudng kinh giing 7200 mm tai md than Hi lim TT Chl tiiu tti mln S6 lugng Hidu qud phd Id hay hidu qud si> dgng % 90 Chilu ddi tiln guong m 3,6 Khii luiTng dd sau mdi chu ky n i nt" 156 Lupng tidu hao thuie n i sau mdi chu ky kg 248.6 Lifpng tidu hao thuie n i lidn don vi kg/nr" 1.6 Lupng thuie n i cho mflt mdt gilng kg/m 69,0 Lifpng tidu hao kip n i sau m i i chu ky Lifpng tidu hao kip n i ctto m i i m' dd Lifpng tidu hao kip n i cho m i i m gilng 2.2 Thdng ke cdng t6c khoan n6 t^i gidng ddng md than him Id Nui Bdo Don vi edi 97 dilm' 0.63 cdi/m 26,95 HQ chi^u khoan l5 gi4ng dimg mo h^m Id Nui B ^ KHCNM S6 11/2016 * ( NKT HAM L m- Thong tin khoa hpc c6ng ngh# mo Bing 10 Lyiichi mln qua dif Ten vdttg S6hiiu iSmin Ddsiu l6min = 4*6 Gdc nghiing 16 mln Lirgng thuie (kg/l6) Dudng kinh vdng mm Ting ItKfng thuoc, kg Cwly IS mm 7Tll> tw nS 1-4 2620 1,4 85» 1000 5,6 703 6-15 2400 1,2 90° 2300 13,2 640 16-30 2400 1,2 90° 3600 18,0 745 31-51 2400 1,2 90° 4900 25,2 727 51-86 2420 1,0 84° 6100 35,0 550 Ting 86 - - - 97,0 - - Log/ tAuic ni P113 - = 8-10 Gflc nghiing 16 mln Si hiiu 16 mln Ddsiu 16 Lupng thuie (kgn6) 1-4 2620 1,4 86° 5-14 2400 1,2 90° Tin vdng Dudng kinh vdng mm Ting lugng thuie kg Cwly IS mm 900 5,6 636 1960 12,00 606 T7ll> twni 15-29 2400 1,2 90° 3020 18,00 628 30^9 2400 1,2 90° 4080 24,00 638 50-73 2400 1,2 90° 5140 28,8 671 74-110 2420 1.0 84° 6100 37,0 520 Ting 110 - - - 125,4 - 23 Phin tich hidu qui khoan ni thi cdng giing dung t^i mi than Ha lim vi md than him Id Nui Bio [S] Kit qua khoan nd quylt dmh d i n tflc dfl vd chit lypng thi cflgn ddo sdu gilng dirng Nghidn ciru cdc tdi lidu hodn cflng, cde ghi chdp cdp nhdt trpng qud trinh gidm sdt thi cflng edc gilng dirng tgi hai mp trdn, thiy ring: Vi hd chiiu khoan n6: Cdc sd lidu tinh todn phgc vy cflng tdc xay dyng hfl ehilu khoan Id d i u e i sy phu hpp vfli dilu kidn dja eo mo theo cdch tinh todn hidn Cdc thilt k l hfl chilu khoan nd Niii Bdo tyong d i i phu hpp vfl'i nhOng kiln thirc vd kinh nghidm thi cflng ngdnh Than nyfl'c ta Cde gilng dirng Niii Bdo sir dung Id dflt phd hinh ndm, khodng cdch midng id 900mm khodng cdch ddy id 445+ 500mm vfl'i gflc nghidng 85° Khoangcach giua cdc Id vd edc vflng nho, nhit Id cde Id tren vflng bidn (hinh 3.) Trong dfl, cae gilng dimg tgi mfl than Hd Lim sy dung Id dflt phd dgng tnj Cde Id dflt phd nim trdn vflng trfln dyfl'ng kinh 1700 mm Cdc KHCNM S6 11/2016 • CNKT H,\M l m Loat thu6e ni P113 MiMJ] Hinh Hd chiiu khoan 15 mln giing gid vi giing phg md than Hi Lim [4J l i bidn d i u c i hyfl'ng chlch rg ngodi bidn voi khodng cdch giu'g hai Id bidn g i n k l 585 * 595 mm (hinh 2) Tif edc hfl chilu hinh vd hinh cho thiy, h i chilu sy dyng tgi gilng dyng m i than him Ifl Nui Beo t h i hidn nhOng yu diim n i i bit, b i tri Thong tin khoa hpc c6ng ngh$ m o "W da vd dang thi cong sau dfl, t i c d i toing binh ehi 20+25 m/thdng Tif do, d s y khdc bigt v l cdc chi tieu kinh t l ky thudt Nhy a Ha L i m , hd s i sir dyng l i mln dgt r i t eao, 90%, trpng cdc gilng khdc chi dgt 70+80%; chit lypng bd ting, hd s i thira tilt didn, Tom igi nd khflng t i t se tgo ndn nhiing he luy d i i vfl'i VO ching be tflng sgu ndy Tgi cdc gypng gilng dimg mo thgn Ha Lim, chilu ddi id mln duifc ngp thuie chilm tfli 75% (2,7/3,6m hodc 3,3/4,2m), 25% cfln Igi Id ehilu ddi du d l ngp bua (600 mm) Trong dfl, d i l vfl'i cdc gilng dimg khdc, chilu ddi id mln ngp thudc ehi chilm khodng 48% Thi dg girong gilng, dd cfl dfl kidn d f = 4+€, chilu sdu l i mln bidn id 4400 mm, ngp thdi thuie, v i i chilu ddi ngp chi dgt 2100 mm Cde hfl ehilu khpan nd tgi d c gilng khdc ngpdi giing Hinh Hd chiiu khoan ni mln sir tlgng tai cic giing diing difng mo than Hd L i m d i u sy md than him Id Niii Bio dyng dpt phd dgng ndm Cdc l i dflt phd, khodng cdch giu'a cdc Id tir chilu sdu, khoang cdch, gflc nghieng d i u rdt phii hpp Khodng cdch giOa cde l i khflng midng Id khing Iflm (-gOOmm) Gflc nghidng cua edc l i d i t phd dd d d i kidn c i f= + Iflm ndn kha ndng phd dd thudn tifln hem Tuy nhidn vide sir dyng khoan chiim d l khoan cdc l i id 85° O l tgo l i , ngifiri ta d i u diing mOi khoan nghidng vd dgt dypc gflc nghidng nhy thilt k l 032, Nhy vdy, dydng kinh thoi thuie P113 Id dfli h i i ehi phi thfl'i gian nhilu hon, khfl khoan phii hpp vfl'i dyfl'ng kinh l i khpan Hd l i m , hon Thuie, kip n i d i u sii' dgng Id P113 hole cdc kich thyflic Id khpan, dififng kinh Id khoan tyong dypng vfl'i ehilu ddi 300mm dyfl'ng kinh hay thii thudc d i u typng ty K i t lu$n 28mm trpng lypng 300gam thfli, kip sy dgng kip vl sai didn sy dyng p h i biln cdc mfl than D l thi cflng gilng difng nhanh, bdp dam cde him Ifl nyfl'c ta Cde phucng tidn ky thudt trang ydu d u k} thudt v l chit lypng, sd lypng vdt bj thi cing gilng dimg khflng khdc bidt lidu tidu hao, v i i cdc trang thiit bj mdy mflc hidn Cflng tde khoan nd Id hai cflng dogn efl, thi cflng gilng dimg tgi m i than Hd L i m ddo gilng dimg, nhung qua qud trinh thi cflng nhd thiu vfli dfli ngu cflng nhdn chuydn nghidp, ddo mdi cdc gilng dimg viing mo Qudng Ninh t i chifc lao ding khoa hpe, chdt che, nhjp nhdng e i 'nhOng khdc bidt mang tinh tich cyc vd hgn ddc bidt vfli vide SU' dung d c ky thudt co bdn t i t c h l dnh h y i n g d i n t i c d i , ndng suit, chit ndn edc chi tidu kinh t l , ky thudt, ddc bidt Id t i e d i vd ndng suit ddo gilng cao, khflng thua kdm lypng thi cflng vo ching d djnh gilng dimg Nhifng khdc bidt t h i hidn kit qud thi t i c d i thi cflng gllng trdn t h i giflri, ciing cflng cdc gilng dimg, dfl la voi cdc gilng Hd dilu kidn ky thudt Tilp cdn, phdn tich, ddnh gid nit nhOng Lim, t i c d i 70+75 nVthdng, cdc gilng 00 KHCNM S6 11/2016 * CNKT H A M L m- Thing tm khoa hpc c6ng nghe mo H i SP, nhit ky ty vin glim sdt thi d n g cym gllng dyng tgi m i than Hd Lim thufle Oy dn khai thdc xuing siu hg ting mure - 50 m i than Hd Lim 2009 Cing ty Xdy dyng s i Than Trung Quie (2011), Hi so hoin cdng giing chlnh, giinggid, giing phu n CbipKHH, H A MapTUHOHKO, A 10 ilpoKonoB, (2000), lllaxmHoe u riodaeuHoe Cmfjoumenbcmeo, ^acmit 1, Bepmuxanbuoe rdi/i#u(ftamllr/ido: Cmeonoe, Hoeonepkacck Nhir Vdn Bdeh, Ld Ngpc Ninh, Hcdng C r OhMKa, B,M, CTaceaHM, (2005), Tuin Chung (2010), Giio trinh khoan ni PaapytneHue PopHbix Flopod Bapbteou MHHCK, Dgi hpe Mo - Dja chit Hd Npi bdi hpc kinh nghidm trpng thi cong gllng dung Hd Lim vd nhung m i than khdc d p thiy, d l ndng eao higu qua khoan, nd min, d n dp dgng tridt d l d c nguydn 1;^ b i tri hidu qua thuie n i theo chilu ddi id mln, si> dyng hpp ly h i ehilu khpan, ni, gidm tii da chung logi hinh dgng l i khoan md thilt bj thyc hidn khdn, ldm giam ndng suit, tic dfl vd d i khfl cho thi eing, giam cdc ehi phi khiu hap tdng then gian sir dgng ca mdy./ Analysis of the efficience in the drilling and blasting operations at the vertical shafts constructed at Ha Lam coal mine with other ones at some coal mines in Quang Ninh area Dr Pham Minh Dac, IMSc Lao Cong Nam, Eng Nghiem Xuan La, Eng Nguyen Tri Thang Institute of Mining Science and Technology - Vinacomin Sammary: Drilling and blasting operation is one of the main works in sinking vertical shafts, ensuring the sinking speed, capacity and quality of the shcfi linings In this paper, the authors refer to the analysis and comparison ofthe efficience in the drilling and blasting opertUions at the vertical shafts constructed at Ha Lam coal mine with other ones gt some coal mines in Quang Ninh area Kill N M s 11/2016 • CNKT 11 \M 1(1 ... qua khoan n i mln thi edng g l l n g dirng tal vung mo Quang Ninh Tif ndm 2009 vd sau dfl, ndm 2012, hai mfl khai thde than bing cflng nghd h i m Ifl tgi viing mo Qudng Ninh dd tiln hdnh thi. .. 125,4 - 23 Phin tich hidu qui khoan ni thi cdng giing dung t^i mi than Ha lim vi md than him Id Nui Bio [S] Kit qua khoan nd quylt dmh d i n tflc dfl vd chit lypng thi cflgn ddo sdu gilng dirng... u nhflp HZ-6 vdn tai bdng thiing tron dung tich 3m'' vd d e thiit bj tfli tnjc d cflng suit SU'' dung tyong du''ong giu''a cdc gilng v l cde logi thilt bj thi d n g cho thiy s y phu hpp v l d n g