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Thong tin khoa hoc cong nghe mo Vi NEO CHAT DEO COT THEP CHONG GIUT CAC DlTONG LO DOC VIA THAN tai eac mo tlian liam 16 vung Quang M n l i Reinforced resin bolts together with steel mesh mat spreading[.]
Thong tin khoa hoc cong nghe m o Vi NEO CHAT DEO COT THEP CHONG GIUT CAC DlTONG LO DOC VIA THAN t a i eac mo tlian liam 16 vung Quang M n l i Reinforced resin bolts together with steel mesh mat spreading first applied to some in seam drifts at some underground coal mines such as Khe Cham, Quang Hanh, Hoanh Bo has brought back significant efficiency in driving and supporting works, ushering a new development in driving and supporting works in coal seams The paper introduces some initial results Dat van de Vi neo chat deo cdt thep (CDCT) la dang vd chdng chu ddng, cd tac dgng huy ddng dadc kha nang mang tai cCia khdi da, gia cadng khdi da, lam tang mddun dan hdi, tang dp ben cCia khdi da va lam giam he sd giam yeu cau true cua khdi da, ngan ngaa sa phat trien cCia ap lac md, dp tin cay cao va dd sCf dung; cd L/u diem chju lac sau lap dat, rat thfch hdp cho cac dadng Id than Id xuat hien ap Igc sdm, khac phgc dadc cac nhapc diem cua vi chdng sat truyen thdng nha giam dapc khdi laong van tai, cdng tac lap dat nhe nhang hdn, cd kha nang cd gidi hoa de dang va cd gia re hdn so vdi vi chdng sat Thdi gian qua, Vien Khoa hpc Cdng nghe Md TS LE VAN CONG TS PHAM MINH DLTC KS N G U Y I N V A N CONG KS TRAN PHUC OjNH Vien Khoa hgc Cong nghe Mo - Vinacomin Vinacomin da tien hanh lap thiet ke, trien khai ap dung chdng vi neo CDCT ket hdp trai ladi thep tai mpt sd dadng Id dpc via than thudc cac ddn vj khai thac than nha Cdng ty than Khe Cham, Cdng ty than Quang Hanh, Xf nghiep than Hoanh Bd, ket qua theo ddi, danh gia cho thay, cac dadng Id hoan toan dn djnh, mang lai hieu qua nhat djnh cdng tac dao chdng Id ca ve kinh te l i n ky thuat, md mpt hadng phat trien mdi cdng tac dao chdng Id than Ket qua ap dung cong nghe vi neo CDCT Tai Cong ty than Khe Cham, sau thu thap, nghien cCfu tai lieu dja chat cac via than, dieu kien ky thuat, danh gia mac dp dn djnh cua cac dadng Id dpc via 13.2.6.1, van tai (DVVT) 12.1, cac hd chieu chdng Id, cac bien phap dao chdng da dadc thiet lap theo day chuyen thiet bj cua cac cdng ty than cd bd sung them cac thiet bj can thiet Khu vac ap dgng chdng Id bang vi neo CDCT ket hdp ladi thep thudc cum via 13.2, tai dadng Id' DVVT 13.2.6.1 mac -190 ^ -175, dadng Id doc via (DV) 12.1 va 12.2 Day la cac via than cd chieu day bien ddi ta 1,23m -^ 6,35m, trung binh 3,32m Via thudc loai dn djnh ve chieu day, ca'u tao kha ddn gian cd gdc ddc tadng ddi thoai, khoang ta 10° den 15° Vach trac tiep chCi yeu la Idp bdt ket mau xam, xen ke la Idp set ket mau xam den tadng ddi mem Chieu day Idp set ket thay ddi khoang ta 0,3m ^ 0,5m Chieu day Idp Bang Cac chi tieu caly cua tung loai da cdng ty than Khe Cham Luc dinh Gidi han Gdc ma Gidi han Dung keiC ben keo sat ben nen Ten da (g/cm') 40%, Idp cat ket taong ddi cCfng vufng ben chac va lien khdi De xac djnh dieu kien ap dgng vi neo CDCT cac yeu td ve via than nha chieu day, gdc ddc, mufc dp thay ddi chieu day, udn lapn cua via, dp ben cua khdi da, daoc chu y de danh gia mac dp ap lac xua't hien va dp dn djnh xung quanh dadng Id Cac chi tieu cd ly dat da, mac dp xua't hien ap lac md ve dp Idn va phapng chieu, xung quanh dadng Id la yeu td quyet dinh de laa chpn dang ket ca'u va hd chieu chdng giuf thfch hdp Cac md hinh sd dadc xac lap de tfnh toan va danh gia mCfc dp dn dinh cCia cac dadng Id theo cac dieu kien dja chat, ky thuat md tai cac vj tri ap dung Cdng tac khao sat, dac de xac djnh cac dac diem khdi da, mac dp nCrt ne va cac thdng sd nham phan loai khdi da, lay mau de xac dinh cac chi tieu cd ly cua da gdm: dp ben nen, dp ben cat, dp ben keo, dp trUdng nd, mddun dan hoi, dp di'nh Idp, ngdt kho, dp chaa am toan phan Bang Thdng sdky thuat hd chieu chdng vi neo deo cdt thep tai Khe Cham TT 10 11 12 13 14 15 No! dung Chieu rong dadng Id Chieu cao dadng Id Gdc ma sat cua da He sd kien cd trung binh cCia da't da He sd an toan Chieu dai neo ndc Chieu dai neo hdng Tai trpng ndc Mat neo He sd vUdt tai ndc Kha nang chiu tai cua vi neo Khoang each giCfa cac neo Sd vi neo vdng Dadng kfnh cdt thep xoan Dadng kfnh id neo Loai cha't deo Ki hieu Don vj Gia trj D W T 13.2.6.1 mac-190 + 175 a m 3,15 hi m dp f - K - In m Ih m Hn T/m^ neo/m^ - Pn T/neo a m - neo - mm CK2335 mm - Qn S 2,74 35 1,20 2,1 1,8 6.2 2,10 1,20 4,0 0,9 22 30 Neo CDCT ^22 LipbakO ( a1)it)1=900x700.1=1800 Lipbelka Hinh Hd chieu chdng Id bang vi neo CDCT tai mo Khe Cham KHCNM s o 1+2 2011* CNKT HAM LO Thong tin khoa hoc cong nghe m o khdi laong the tfch, dd rdng Lj- ^ , , , Hinh dang tiet dien cua cac dadng Id chdng neo CDCT thadng chon la hinh thang can ^^-^ ^^^^- ^^^ |^ ^am vach nham tan dung hinh dang tU" nhien cua ndc Id va tao dang ban dam chiu Ig'c hdn chd ndc Id ddng thdi viec tao hinh d l dang hdn so vdi viec tao hinh vdm Tuy nhien, qua trinh ap dgng cd the thCf nghiem ca hai dang de cd nhufng danh gia eg the hdn Hd chieu chdng Id dpc via than van tai 13.2.6.1 mCfc 190 ^ -175, Cdng ty TNHH MTV than Khe Cham dadc md ta tren hinh • Tai Cong ty TNHH MTV than Quang Hanh, vi neo CDCT dapc ap dgng tai Id dpc via than VI3 khu mac -15 va dadng Id doc via thdng gid (DVTG)mac-7, V.15khulll Hinh Hd chieu chdng Id bang vi neo CDCT tai via 15 mUc -7 md than Quang Hanh Bang Thong sdky thuat hd chieu chdng vi neo deo cdt thep tai via 15 muc -7 mo than Quang Hanh Gia tri DWT1 TT Ki hieu Ddn vj No! dung via 15 mac-7 m Chieu rpng dadng Id a 2,6 m Chieu cao dadng Id 2,446 hi Gdc ma sat cua da dd 33 (P He sd kien cd trung binh f cua da't da He sd an toan 1,20 k m Chieu dai neo ndc 2,1 In m Chieu dai neo hdng 1,8 T/m2 Tai ndc 6,0 Qn S neo/m^ Mat neo 1,80 1,20 He sd vaot tai n6c np T/neo 4,0 10 Kha nang chiu tai cua vi neo Pn a m 0,8 11 Khoang each giaa cac neo neo 12 Sd vi neo v6ng mm 22 13 Dadng kfnh cdt thep xoan mm 30 14 Dadng kinh 16 neo CK2335 Loai chat deo 15 KHCNM s o 1+2/2011* CNKT HAM LO Via 15 cd chieu day via bien ddi ta 0,66m -+ 3,5m, trung binh 1,6m Via 13 thudc loai khdng dn dinh ve chieu day, cau tao rat phac tap, sd Idp kep via bien ddi ta -^ Idp Via thudc dang cd dp ddc Idn, gdc ddc via khoang 45° + Vach trac tiep la Idp bdt ket mau xam, xen ke la Idp set ket mau xam den tadng ddi mem; chieu day Idp set ket thay ddi khoang ta 0,4m ^ 0,6m; chieu day Idp bdt ket ta ^ 3m + Vach cd ban nam tren vach trac tiep, chu yeu la dat da cat ket, tadng ddi day va dn djnh + Trg via thadng la da't da set ket, bdt ket mau xam den, mat dp khe nCft ft, he sd kien cd f = ^ Can ca vao didu kien dja cha't via than, vach va tru via, hd chieu va bien phap thi Thong tin khoa hoc cong nghe mo cdng, day chuyen cdng nghe chdng Id bang vi neo CDCT dapc lap va phe duyet, ho chieu chdng neo CDCT dddc md ta nha tren sd dd hinh Nhdm thac hien de tai Phdng Cdng nghe Xay dong Cdng trinh ngam va Md Vien Khoa hpc Cdng nghe Md da ket hdp cung cac cdng ty than trien khai ap dung chdng giuf vi neo CDCT theo thiet ke va bien phap dddc duyet, ddng thdi cap nhat dieu kien dia cha't, sd dadng Id, khoan la'y miu tai cac vi tri thi cdng, quan trac, giam sat djch ddng, bien dang cac dadng Id chdng neo CDCT de danh gia dp dn djnh cua dadng Id Hd chieu chdng Id bang vi neo CDCT tai dadng Id DVTG mCrc-7, V.15 khu III daoc md ta nha tren sd dd hinh Tai Xi nghiep than Hoanh Bd, vi neo CDCT dadc ap dung chdng d Id dpc via Via 7, mCfc mac + 190 Dac diem cua via than nha sau: Via 7, cd chieu day trung binh dao ddng ta 1,8m ^ 2,5m gdc ddc 10° H- 15° nen dadng Id di bam trg ndc Id nam Idp bdt ket Than thudc loai phan Idp mau anh kim Cac phan Idp cd chieu day ta -^ 5cm cd dp ben cd hpc ta f = H- theo Protodiaconov, dp ben nen ta 10 ^ 20MPa Than thudc loai khd vd nen cd nhieu than cue khai thac Vach gia la Idp set ket mdng, chieu day khdng Idn va tri khdng lien tgc Set cd dp ben bam di'nh vdi vach trac tiep cao khd gid Vach trac tiep cd chieu day trung binh ta +3m la Idp bdt ket ft bj phan Idp Neo CDCT ij)22, LipsOkd Hinh Hg chieu chdng Id bang vi neo CDCT tai mo Hoanh Bd Bang Thdng sdky thuat hg chieu chdng vi neo deo cdt thep tai Hoanh Bo TT Noi dung Ki hieu Ddn vj Chieu rdng dadng Id Chieu cao dadng Id Gdc ma sat cua da He sd kien cd trung binh cua da't da He sd an toan Chieu dai neo ndc Chieu dai neo hdng Tai trpng ndc Mat neo He sd vaot tai ndc Kha nang chju tai cua vi neo Khoang each giaa cac neo Sd vi neo vdng Dadng kfnh cdt thep xoan Dadng kfnh Id neo Loai chat deo a cp m m dd f - k - In m m 10 11 12 13 14 15 • nuft ne Bdt ket tai vach cd dp ben trung binh, khoang 50 -^ 70 MPa, trung binh 60MPa Phfa tren Idp bdt ket la Idp cat KHCNM S6 1+2/2011* CNKT HAM L hi Ih dn T/m2 Gia tri D W T via mac +190 3,15 2,76 33 1,20 2,1 1,8 6,0 2,0 1,30 s neo/m^ Hp - Pn T/neo a - m neo mm mm 4,0 0,9 22 30 CK2335 - - - ket hat trung mau xam sang Ldp cat ket cd dp ben nen tdt hdn Idp bdt ket va cd chieu day on djnh Dp ben cua cat ket Thong tin khoa hpc cong nghe m o W trung binh 80MPa Chat lapng khdi da d day tadng ddi tdt, RQD > 70% Hd chieu chdng neo CDCT chi tiet tai Id +190 dadc md ta tren hinh Cdng tac chdng Id bang vi neo CDCT cd nhieu cdng doan hdn cdng tac chdng bang vi chdng thep Chat deo SLf dgng la loai cd cadng dp khang nen 60-80 MPa, khang keo 15-20 MPa, mddun dan hdi: 6-8 GPa Thdi gian trdn chat deo cd the keo dai ta vai giay den vai chuc giay (bang 5) nay, day cap ndi lien thadc vdi Id xo dadc gan cd djnh vao Id khoan tren ndc Id, dam bao quan sat dadc cac djch chuyen cDa dat da ndc Id (hinh 4) Mpt nhiem vg quan trpng cdng tac chdng neo la theo ddi, quan trac djch ddng va danh gia dp dn djnh sau chdng Ket qua quan trac, cap nhat tai cac dadng Id chdng vi neo CDCT cho thay, dp dich chuyen ndc cCia dadng Id la khdng Idn, nam gidi han dam bao an toan, dadi 25mm BancJ5 Loai oac tfnh CK, CK K Tdc dd sieu nhanh Tdc dp nhanh Tdc vaa Tdc dp cham Thdi gian ninh ket (giay) 8-25 8-40 41 - Thdi gian IL/U gia (giay) 10-30 10-60 90-180 Mau sac Nau Ngoai ra, dp bien dang cua hdng Id cung dadc dac bang each danh dau tai cac vj trf dudi neo hdng vdi khoang each neo mpt lan vdi chu ky lai tien hanh kiem tra dp dn djnh mpt lan Theo cac sd lieu quan trac dac da tdng hdp thi dp bien dang cua dadng Id (ndc va hdng) cung khdng Idn, vin dam bao pham vi an toan cua thiet ke, ta ICic lap dat neo den nay, dp djch ddng cua ndc va hdng Id van hoan toan dn djnh (hinh 5), djch chuyen dat da ndc Id hdi tu ve gia trj 5, 6mm, djch chuyen hdng Id phat trien pham vi cho phep + Cdng tac td chiic thi cong: hien tai, mdi gadng thi Lam cdng neo thadng bd trf cdng 480 Trang 91-180 Z nhan va mpt phd quan ddc >180 M trac ca De thac hien chdng neo ta cdng khoan den lap dat Ghi chu: Do dac diSu kien mdi tn/dng (22 ± 1)°C neo thi can tdi thieu cdng nhan va thac D^nh gi^ dn djnh Kit cau tram djch dgng va bien dang cua hien chdng hoan ,1?, dudng Id: thien mpt Id neo thi can khoang 12 Dpc theo tuyen Id H- 15 phut (tfnh ca chdng vi neo CDCT, cac thdi gian ach tac tram djch ddng ndc thi cdng nha da dadc lap dat de danh tac chodng khoan, gia dp bien dang va dn tudt dng hdi ) djnh cCia dadng Id Cac Nha vay, de chdng tram djch ddng ndc sCf hoan thien mpt dung cac bd chi thj mau, vdng neo gdm bd bao gdm thadc neo thi phai mat A va B, tren dd cd cac khoang 105 phut, vach chia dp den dp thdi gian chdng chi'nh xac mm, mac dp so vdi vi thep dich chuyen ndc Id se thi cao hdn gap Hinh 4-Bgdo djch dgng chi thj mau dadc doc tren cac thadc KHCNM S6 1+2/2011* CNKT HAM LO Dd Thong tin khoa hoc cong nghe m o SL; phat trien cua bien dang nocio chong vi neo CDCT (Tram DD1) E E •o•o c o ^ j ^ •^ E' •TO i:5 y %^ « # ,* ,* ,