Thong tin khoa hoc cong nghe mo NGHIEN Ciiu DINH HUOTNG AP DUNG NEO CAP CHONG LO LUA CHON DONG BO DAY CHUYEN THIET Bl, VAT LIEU THI CONG CHONG Ld BANG Vl NEO For meeting the requirements of the coal o[.]
Thong tin khoa hoc cong nghe m o NGHIEN Ciiu DINH HUOTNG AP DUNG NEO CAP CHONG LO LUA CHON DONG BO DAY CHUYEN THIET Bl, VAT LIEU THI CONG CHONG Ld BANG Vl NEO For meeting the requirements of the coal output, decreasing the expenses in dnving and support works, recently, the anchor bolts have been used in support works at many underground coal mines in Quangninh with initial significant achievements However, the length of the drifts supported with the anchor bolts has been limited, accounting for 1% of the total annual driven ones In this paper, the authors refer to the orientational study on the application of the cable anchors to support works, selection of the equipment and materials for support works with anchor bolts Ddt van de Trong cdc md hdm 16 dudng 16 ching giLf bang vi chdng sat SVP truyln thing cd chi phi Idn, muc dp co gidi hda khau chdng giif bj hgn chi, toe dd thi cdng cham D I dap ifng yeu d u ve san lugng, giam chi phi dao ching Id, nhu'ng nam gan day, nhilu md hdm 16 viing Quang Ninh da ap dgng ching 16 blng vi neo, budc dau da cdng vd cho kit qua kha quan Tuy nhien, den khIi lugng dudng 16 chong bdng kit cdu neo van cdn han chi, chi khoang 1% tdng khli lugng Id dao hang nam Tdng hgp nhu'ng kinh nghiem vd ngoai nudc, bai bao de xuat mdt sd phuong phdp lya chon, dp dung chdng giu' cdng trinh ngim bdng vi neo kit hgp neo cdp, ding thdi gidi thieu mdt so td hgp thilt bi, vat lieu vd giai phap thi cdng chong Id bang vi neo chdng giip cdc cong trinh ngdm cd tiet dien, khiu dp Idn cac md him 16 vung Quang Ninh Gidi thieu neo cdp He thing cac vi neo la mpt he vi ching, chong giu' dat da yeu dudi dudng vdm phd huy ty nhien Hen kit cae Idp da mdng mdt Idp day hon, b i n hon, on dmh hon Trong mpt s i trudng hgp dudng 16 di qua viing dat da y l u , ngudi ta sCf dung ket cau chong bdng vi neo de ching tiin trudc guong Vi neo chong giCf cdng trinh ngam dugc phan theo nguyen ly chong giif co ban: tree, ban dam va nem Tren co sd cae irng dung thyc t l , sau xem xet cac he thing neo diln hinh, cd KHCNM SO 9,2014=: CNKT HAM LO KS NONG VI£T HUNG KS NGUYeNXUANTRUO'NG Vien Khoa hoc Cdng nghe Md - Vinacomin TS.NGUYEN PHI HONG Truang Dai hoc M6 - Dia chit Hi Ndi Bien tap- TS Ph^m Mmh Ddc t h i s i p xep cdc loai neo khae thdnh cac nhdm vol nhi>ng dac trung mang tinh chit dgi dien cho tifng nhom, bao gom neo co hpc, neo dinh kit vd neo cap, neo ma sat Thyc te, doi vdi cac dudng 16 md, neo co hpc, vdi cot neo bang thep dugc dp dung phi bien nhat Nhu d My, neo co hpc chiem t j le 60%, neo chit deo cot thep (CDCT) 30%, cdn lai la cae loai neo khac, nhu neo buong, neo cap, va neo ma sdt V l k i t cau neo, qua khao sat thue t l , cd it nhat logi neo khae ed sir dung chit d dudi, bam dinh bang vCra suit chieu dai elt neo Ben canh do, neo kit hgp, neo diem, neo irng suit vdi ranh T d i u dugc sir dung rdng rai Trong nhilu trudng hgp, dat dd y l u , hign tugng ndc bi cdt, cdc kit cau neo don le khdng hieu qua, dd, ngudi ta su dung them gidng, len kit cdc neo don le thdnh mpt khoi, dd, neo cd vai trd nhu mdt edi mdc, tree giang Trong eae loai k i t d u neo ndi tren, cae md hdm 16 viing Quang Ninh da dp dgng mpt so loai, nhu neo be tdng cot thep (BTCT), CDCT, neo ma sat, Tuy nhien, mdt so logi neo, dd, neo cap, vdi nhij'ng uu diem noi bat, nhu: Gid re, d l ldp ddt, t u l i thp lau ben, cd kha nang mang tai cao, dieu kien dat dd ylu, eong trinh cd khau dp Idn, nhu cde nga ba, nga tu, san ga, ham tram, cd t h i l i p dgt vdi chilu dai b i t ky khdng gian chat hep, vin chua dugc dp dung Thong tin khoa hpc cdng nghe m d Hinh Ching gid kit hop neo, neo cip - giing Hinh Bua Schmidt duoc chd tao cd ba CO khic L,Nvif\/l Trong kit d u neo cap, cap vdi vai trd Idm y l u t l gia e l duge lam bang cdc sgi thep, thudng la sgi, bgn xoan Igi vdi vd dugc ldp dat vao l l khoan, moi lo khoan sir dung d i n bd edp, d dgng cd hogc khdng cd irng suit trudc Trong xdy dyng md, chu y l u sip dgng loai neo cap khdng ipng suit trudc, dinh k i t tren todn bd chilu ddi neo bang vCfa xi mang Khi ddt dd phdt Hinh Mui khoan liy Hinh Miy khoan neo sinh bien dang nhat djnh neo cap mdi tilp nhgn ndc vi khoan liy miu mau xic dmh RQD MQT-130/3.1 tai trpng Cde logi neo edp ngan (chilu ddi nhd hon 6m) cd t h i sif dyng de thay t h i cae Thiet bi khao sat nhanh hien trudng thdp tron hogc thep gd kit d u neo Khdng Bua Schmidt (hinh 2) su dyng de xdc djnh thi su dgng neo cdp Id khoan ed nude nhanh dp ben ciia khoi dd tai hien trudng Biia Schmidt dugc che tao cd ba cd khde nhau: L, N Ngdy da ed nhilu logi thilt bj gliip co gidi hod todn bd cdng tdc thi edng lap dgt neo, ke ca vd M, vdi ty le nang lugng dap Id 1:3 40 Loai N neo thdng thudng vd neo cdp, vdi ndng suit cd nang lugng dap Id 0,225kGm cao, chit lugng neo I n djnh, tif dd, viec dp dung Khi si> dung 6k xac djnh dp bin da theo cac ehlng Id bang vi neo edng cd dilu kien phat hudng dap khde d n phdi tra bang tinh triln Lg'a chpn d i n g bp t h i l t bj, vat lieu thi 2.Thiet bl khoan Idy m l u RQD ciing nhu khoan thdm dd dia chit Mlu khoan (Idi khoan) cong chdng 16 bdng vi neo Ding bp thilt b] thi cdng chong Id bang vi neo phai duge lay day du, vl nd phan anh dac tinh bao gIm: thilt bj khao sdt nhanh, ddnh gia lya lien tuc vd dp ben cua khli da Vi vdy khoan ehpn dieu kIgn dp dyng; khoan lay m l u thi mdu de xdc djnh RQD phai Id khoan xoay vdi nghlgm, khoan Id khoan lap dgt neo, thiet bj keo, mui khoan sac (hinh 5) Idi khoan khdng bj vgn cit neo cdp, dgng eg idp neo, neo cdp, thilt bj hay tdc ddng co hpc Idm gdy Sif dgng cdc thip tdi neo, thilt bi dich dpng, V l vat lieu chodng khoan chuyen diing d l noi dai den chilu thi edng, gIm ed chodng khoan, dau n i l , mui ddi d n thilt d n khoan Idy mdu khoan, elt neo, dai l e , t i m dem, 3.2 Cac thiet bi, vat lieu dong bo thi edng gidng, Ciing vdi cdc thiet bj, vat lieu khac, mdy chdng neo phun b l tdng, chit keo deo, ludi thep, Thyc May khoan neo noc MQT- 130/3 t l , nlu su dgng thilt bj, vgt ligu hgp ly, khdng Chu y l u sif dung d l khoan liy mdu, khoan nhirng dam bao chit lugng ehlng Id bang vi neo, md cdn ndng eao ndng suit, giam gia thdnh cae Id neo thdng thudng vd neo cap cae dudng Id da ed he s i kien c l f ^10, dac biet thich thi edng hgp khoan Id neo Id than, dong thdi d l Trfen eo sd ede thilt bj, vgt ligu hign cd, nhdm khuly chdn chat deo, tryc tiep van chat bu Idng nghidn ciru dua mpt s i ddy chuyin vd thiet bj hodn thien cdng tac l i p dat neo md khdng d n ding bd dp dgng thyc t l san xuit cac thilt bj phu trg khde Cd the sir dung de vgn KHCNM SO') 2014* CNKT HAM l.c Thdng tin khoa hoc cong nghe md May Aeo neo cap May keo cap MS15-180/63 MS18-200/63 (hinh 6) la thiSt bi de hoan thien cong tac iap dat neo cap, thong qua iyc keo lam cho neo cap cang ra, tao d y Cmg lyc cho neo cap ThiSt bi CO trpng lypng nhe, t h i tich nho, d l mang vac h i m 16, lam viec dang tin c?y va CO he s6 an toan cao May cit neo cap Sau da keo cang dau tho ngoai Id cua neo cap, neu dau tho ngodi qua dai se sy dung may cat neo cap de cat cdp Dung cu lap neo May khoan neo hdng MQTB-80/2.0 DCjng de lap dat bu long vao dudi neo, lap Chii y l u sir dgng de khoan cdc Id khoan neo neo dyong kinh t y 16 -^ 24, kich thydc hdng vd neo cdp ben hdng cdc dudng Id duoi dung cu B = 19, B = 22 (thyang bang kich da cd he s i kien cd f dgng bp khda neo tuong ifng, thi du sir dgng neo cap cd dudng kinh 15,24 thi thdng so eua bp khda neo la- dudng Hinh 15 Vit tu phu kidn neo KHCNM SO 9'2014» CNKT HAM LO Thdng tin khoa hpc cong nghe md Hinh 16 Neo cap va bd khda neo chuyen dung Hinh 17 Mot sd kidu dai dc thudmg su dyng kinh ngodi 44mm, chilu ddi 46mm, dp thu nhd ben Id 12°, chilu ddi kep cap 41mm, dudng kinh ngoai ddu thu nhd 12mm, dudng kinh dau to 28mm, lugng 0,6kg - Tdm dem, dugc diing d l phan bd d i u tai trpng tae dung tai duoi neo len be mat khoi da Cd loai tim dem, loai phIng vd loai d u Cdc tim dem phang ed t h i sir dyng be mat khdi da nhin vd cac neo dugc lap dat vudng gdc vdi be mat cua khdi da Cde tam dem d u ed t h i lap dat nghieng mot gdc nao dd so vdi b l mat ciia khli da ma khdng gay irng suit keo b i t lgi tdc dung len dau neo Ngodi cdn ed mdt loai tam dem dae biet dugc SLf dgng kit hgp vol dai thep hinh chtf "M" Loai tdm dem ndy sCf dung trudng hgp dudng 16 ddo qua ddt da mIm y l u phai sii' dung them giang hinh chij' M d l 1dm tang kha nang mang tai ciia t l hgp k i t d u chdng - Dai l c , cd hai loai dai de sir dgng thi cdng neo, loai thdng dung va logi chdng Idng ldp dat nhanh Trong thyc hien eho thiy chdng giij blng vi neo thdi gian ddi thi vdi logi dai l c thdng d l bj Idng ra, dd it dugc sip dgng Cdn doi vdi loai dai l c ehlng Idng ldp KHCNM s o 9/2014* CNKT HAM LO nhanh, su' dung cho nhu'ng uu dilm ndi trdi K i t luan He thing cdc vi neo Id mdt he vi chdng lam on dinh vdm dat da y l u Qua qua trinh thyc t l cho thiy higu qua kinh t l cua viec ehlng giu" eac dudng Id bang vi neo so vdi ching giii' bang khung chdng thep thdng thudng rdt Idn Trong dd, neo edp ed the dp dgng cde dieu kien cdng trinh d i t da y l u , khdu dp cdng trinh Idn, md k i t d u ehlng truyen thong khd thyc hign dugc Tip dd, viee nghien ciru dp dgng kit cdu ehlng hdn hop giifa vl neo CDCT vd neo cap Id rdt d n thiet Chit lugng va hieu qua thi edng neo phy thudc vdo thilt bi, vat lieu thi cdng Tiiy dilu kien eg the, edc don vi d n xem xet, lya chgn dau tu ddng bd thilt bi phii hgp, si> dyng vat lieu thi cdng dung chung loai./ Tai iieu tham l