KHOA HOC VA CfiNG NGHE MO jm ^UXG DUNG BAI TOAN BOUSINESSQ DE XAC DINH CAC THONG SO CUA DAU DAP THUY LOC KHI PHR V d Dni f>n TRCN MO LO THI€N ThS NGUYEN HOANG, PGS.TS BUI XUAN NAM Trwdng Dai hgc Md-Dja chSit i | k ren cdc md lp thifn hifn nay, cd rit nhilu I phuyng phdp phd vd dit da nhy: phd vd dit ^ dd bang dong bf khoan-nl min, bdng eo gidi, bdng vdt Ij?, bdng hOa hpc, bang sde nudc, Hlu hit cdc md 10 thifn tgi Vift Nam diu su dgng phd vd dit da bang phuong phap khoan-nO vd hifu qua cua vife phd vd ddt da bang phuyng phap khoan-nd Id khdng t h l phu nhan Tuy nhifn, tgi mft s l mo If thifn cO khu vyc khai thdc nam gin khu vyc ddn eu, gin cac eOng trinh di tieh lich sd eln bao vf thi ddi viee sd dyng , phuong phap phd vd dit dd bdng khoan-no la i khdng kha thi LOc ndy, nlu khdng su dgng cdc I phuong phap khdc thl bien gidi md se bj thu hep ! Igi, gd^ tin thit tai nguyen khodng san cd ich I Idng dit, thift hai v l kinh te cho md Do vdy, trudng hyp ndy, su dung diu dap thuy lyc la giai phdp toi uu NOi dung bdi bao gidi thifu vifc dp dgng bdi todn Bousinessq df xdc djnh vd mO phOng qua trinh phd vd dit da tryc tilp tren ting eua diu dap thuy lyc tren cdc md 10 thifn b D I U dfp thuy lyc ddng d ting dudi, phd v trye tilp dit dd d ting tren, chat tai bing mdy bd vdi gyong bfn hdng, vdn tai bdng tO; e Ddu dap thuy lye ddng d tang dudi, phd v tryc tilp dit da d ting tren, chit tai bing may XL vdi guong dpe ting, van tai bdng d td; d Diu dgp thuy lye ddng d ting dudi, phd v trye tilp dit da d ting tren, chit tai bing mdy xi vdi guong ben hdng, van tai bing d tO; e D I U dfp thuy lyc ddng a ting trfn, phd y tryc tilp dit dd d ting dudi, chit tai bing mdy bt vdi guyng dpe ting, van tai bang tO; f D I U dfp thuy lyc ddng d ting tren, phd y tryc tilp dit dd d tdng dudi, chit tai bing mdy bt vdi gyyng ben hdng, van tai bang d td; g Ddu dap thuy lye ddng d tdng trfn, phd v tryc tifp dit da d tdng dudi, chit tai bing may XL vdi gyyng dpc tdng, van tai bing d tO; h Diu dap thuy lyc ddng d ting trfn, phd v trye tilp dit da d ting dudi, chit tai bing mdy XL vdi guong ben hdng, van tai bing td; i D I U dfp thuy lyc dung d mat ting phd vd d; I Cae SO" dd pha v d ddt dd t r f n t i n g s d dd tryc tifp cCing mdc may ddng, chat tai blr j dgng ddu dap thuy lye mdy bic vdi guong dpc ting, vgn tai bang d td; j Diu dap thuy lye dung d mft tdng pha vd d; i Bdu dfp thuy lye v l co ban cd cau tgo giong j nhu may xuc thuy lye giu nguyc, nhung tgi^vi tri da tryc tilp eCing mde mdy ddng, ehat tai blr j gau xuc duyc thay bing cdc diu chodng d l phd mdy bic vdi guong ben hdng, vfn tai bing td; j vd dit da Do cO c l u tgo tyyng i y mdy xdc thuy k D I U dfp thuy lyc ddng d mft ting jDha vd d j lye giu nguyc nen quj dgo Idm vife eua ddu dap da trye tilp eiJng mde mdy ddng, chat tai bar I tliuy lyc Id rdt rpng vd linh hogt Ddu dap thuy lye mdy xue vdi gyyng dpc ting, van tai bang d td; I cO t h l ddng d mgt ting dudi vd phd vd tryc tilp Ddu dap thuy lyc ddng d mft ting phd vd d i dit dd y mat ting tren, ddng d mat ting tren phd dd bye tilp cung mdc mdy ddng, chat tai blr ! vd tryc tilp ddt dd mat ting dudi hoae phd vd dit mdy xue vdi guong ben hdng, vfn tai bing 010 i dd cung mdc may ddng Cac so d l cdng nghf kha Ap dung bdi toan Bousinessq xac d|r I thi su dyng diu ddp thuy lye d l pha vd ddt da nguyen ly pha v d ddt da cua ddu dap thuy lyc i tryc tilp trfn ting nhu sau [1]: a D i u dgp thuy lyc ddng d ting dudi, phd vd tryc tilp dit dd d ting tren, chit tai bing mdy bic vdi guong dpc ting, vfn tai bing td; Khi sd dung diu dap thuy lyc de phd vd d i t c tryc tilp trfn tang se tgo cdc dng suit vd d i t c s§ bj phd vd bdi cdc dng suit duyc sinh CftHE NGHIEP MP Sfl a-2015 K l J^_ KHOA HOC VA CONG NGHE MO l^ng suit Id cuang cua nOi lyc tren m6t flo-n vj di^n ticti: ZSP (1) p = lim /SF Xet mot dilm 1^ thupc nen dat va co sau la z, ciliu tac dung cIJa mot ngoai lire P tren mat dit ttii dilm M se chiu mot ap lyc tac dung len no va sinh i>ng suit tai dilm M [2j Gia thilt, xem nhy m|t ting la mgt ban khong gian v6 han, moi tryffng dit da cin pha va tren ting la ding nhit, ding hyang va quan he giya yng suit vd bien dang la quan he tuyin tinh theo ly thuylt dan hli, lyc tac dung len b l mat theo phyang thing dung va vuong goc vO\ b l mat tac dgng Khi diu dap thuy lyc pha va dit da tren mat ting, diu choong se tac dung len d i t da mot ngoai lyc tdp trung P vd sinh cac yng suit nen lan toa dit da vd cdng xa thi yng suit cang giam din (H.I) Khi gap b l mat can (sy&n ting) thi cac l>ng suit nen lan toa tac dung len b l mat can Khao sSt dilm M bit ky dy6i tdc dgng cua ngo? va t90 c^c yng suit phan xa (yng suit l'" R = •R3(R + z ) ^ Vdi \i Id h^ s6 nd hdng (hay gpi la he s Podt-xdng) vd dydc xdc dinh qga cdc thi nghiei ndn mig t h l hi$n Bang Bing I.Hi so na hong // cOa dit di [3] Loai dit da BltddcCmg Cat Sdt Cling A set , Set deo H^ s6 nd hdng 11 0,1+0,3 0,25+0,3 0,2+0,3 0,33+0,37 0,38+0,45 H.4 Cin bing tinh hoc cua Crng suat Trong thyc te tinh todn o; thudng duyc dung n Cfng vdi so gia dp, xem OR phdn bo dig va ting hop biln nen o; thudng duyc vilt dudi dgng: &R=P (tai trpng ngodi) Thay (5), (9) vao (8) ta cd: 03= k P - fB.-^^^.cos|3cospsinpinp.R=0 (10) o P - ~ A B = >AB = Thay(11)vdo(5)tac6: OR = 3P cosp "2^' R2 Chilg OH ISn trgc ta c6: • Crng sgat phap: 3P z^ ^ 2it R= »' , 1-2ti R5 • (11) -Rz-r R^(R + Z) (12) (13) (14) X^(2R + Z) R-'(R + Z)' (19) Trong dd: k - He so phu thugc vdo (r/z) vd dug xde djnh theo dd thj H.5 Nhu vdy, sau xdc djnh duyc dng suit ne Gn ngoai lyc tap trung gay ra, ta l[trk] thi dit dd bj phd vd theo ki qua cua bai todn BoLisinessq md tde gia da tir todn d trfn vdi [cjk] duoe xdc djnh theo tdng lo dit da eu thl Tuy nhifn, theo nguyen 1;^ hogt dOng eua di dfp thuy lyc thi ngodi ede thdng s l ky thuft \ thdng so lam vife cua diu dap thuy lye cdn cd t^ so dap eua diu dfp thuy lyc T i n s l dap Id s l \i Ifp Igi qud trinh ddp eua diu ddp thuy lyc tror mft don vj thdi gian Vdi trgng luyng bOa, dp lg diu choong, lye dap khdng d l i nfn dng suit n^ sinh cung khdng dli, tdc d^ng lifn tgc vao d i t c vd IDc ndy ddt dd bj phd vd chu y l u co che mt CONG NGHIEP MO, sd 4-2015 I 12^ KHOA HOC VA CdNG NGH| MO Rd rdng, v l mat djnh tinh thi tin sd dap cdng cao ddt da phd vd se edng hifu qua; tdc Id hieu qua pha vy dit dd ti If thufn vdi t i n sd dap Do vfy, ngudi ta se tinh toan d l giam ngogi lyc tdc dyng, ding nghla vdi viec giam dng suit nen ngogi lyc tgp tnjng gay vd tang tin s l dap d l dit dd bi phd vd theo co chl mdi (theo bdi todn dao ddng cudng bdc) dam bao yeu cdu pha vd dit da hieu qua vd t l i uu hda ede khdu kmh te-ky thudt /—'V » •" u - • £ " o • P t \s t \ s *- , \s 'f N,; < • \ = • ^ = * ^ tAc, " " tt c^ • i i • • '', Khi pha vd ddt dd trfn tdng, chilu rfng m$| ting rfng chilu cao tdng Idn nfen dng suit lanloa rdng va edng xa^thi dng suit eang giam &(ln dap ddu tien, dau chodng tdc dgng len b l ^ » dit dd tren ting mOt lyc P, se sinh sdng p i j suit lan tda ddt da, va cdng xa tfi) sdit dng suit cang giam dan Khi gdp be mgt r"^ (sudn tdng) se tgo thdnh sdng phan xg truyen Nlu ngdng tdc dung lyc, theo nguyen \^ dan cua dit da, dit da cd t h l khdi phgc Igl mft phj hof c todn bo hinh dang, trang thai ban dau t tdng theo tinh chdt ca ly cua tdng logi dit dd _ thl Nhung nlu tilp tuc tdc dgng mft lyc P sau lln dfp thd nhat, sdng dng suit s€ tiep tec sinh vd lan tda dat dd Luc ndy, nd ga sdng phan xg cua lan dap thd nhit vd xay hi^ tuyng giao thoa sdng dng suit Vd nlu cd tilp tdc dgng Ifn bf mft d i t dd b'fn ting lifn tgc vdi s l n thdi gian ddi thi ddt da se bj phd vd, khdi ting theo co c h l mdi I i H Bo thi xdc dtnh hg so k theo r/z doi vdi tat trgng t$p trung Mo hinh hda nguyen ly va quy trinh pha vd ddt da tren tdng ciJa ddu dfp thuy lu'c theo k i t qua cua bai toan Bousinessq Td cac kit qua tinh todn theo faai todn Bousinessq tren, tdc gia sd dung dng dgng 3D Max d l md phdng, minh hga nguyfn ly vd qua trinh phd vd dit da trdn ting eua ddu dgp thuy lyc Thd ty phd vd dit dd tren ting duyc thye hifn nhu H.6 H Song ung suat va sdng phim xg sinh ktu) va dat da tnjc Sep trdn tang bang diu dpp thuyl( H.6 ThCtttfphi vaditdi trin tang 5i> dtmg diu a$p thuy li/c CANGNGHl|Pm6,S((4-2015 Ngoai cdc y l u t l vf lyc dgc true sinh piston dap, tan so dfp cua piston tdc dgng Ifn chodng thi so mft ty cua d i t dd cDng c6 hu-dng rat Idn tdi hifu qua phd vd d i t dd cua ddp thuy lyc Vd r6 rang vdi b i mft d i t dd cO nhilu mdt ty thi cang d§ phd vd , Cdc hinh H.7, H.8 vd H.9 gidi thifu: sdng ui% suit vd sdng phan xg sinh phd vd d i t dd t tilp tren ting bdng diu dfp thuy lyc vd mO phi KHOA HOC VA CONG NGHE MO I nguyiD ly vd qua trinlmpl^^k^dt|d:a^tryc tiep eua ddu f p thuy iMP^tg^odb^^a^:iQua bdi todn Bousinessq K f t luan Tu cde kit qua nghifn cdu v l nguyen Iy ldm viec eung nhu nguyfn I;? phd buy dit dd cua ddu dfp thuy lyc, cd t h l thiy diu dfp thuy lyc lam vifc rit hifu qua nhung trudng hop khdng thf sd dgng phuang phap khoan-no d l pha vd d i t dd tren cde md Id thien CDng vdi vifc nghien edu dng dgng bdi todn Bousinessq vd dp dgng kit qua eua bai todn Bousinessq, cho phep tinh todn cde thdng s l cua ddu dfp thOy lyc phij hyp vdi tinh chdt co ly cua dit dd se mang lai hifu qua eao v l kinh tl-ky thuft d l td dO lya chgn logi dau dfp hyp ly cho tdng mo vdi tdng dilu kifn eg t h l khdc nhau, ndng cao hifu qua sd dgng thilt bj co gidi khai thdc md lg thien, bao vf mOi trudng vd phdt triln bin vung.D TAI LIEU THAM K H A O BDi Xudn Nam, Nguyin Phy Vy Cdc phuong phap chuin bj dit dd bing ca gidi khai thdc md lg thien Bdi giang cao hgc ngdnh Khai thdc md Id thifn Trudng Bgi hgc Md-Dja chat 2010 Cao Van Chi, Dang Vdn Cuang Gido trinh ca hgc dit Trudng Dgi hgc Thuy lyi 2005 Mft s l tdi lieu tham khao trfn internet Ngwdi bien tpp: Ho ST Giao H.8 Mo phong nguyen ly pha vd dit da cua diu dap thuy luc theo kit qua cua bai toan Bousinessq H Md phong qud trinh pha vd dat da tnjc tiep tren ting bang diu dap thuy luc theo ket qud cOa bdi todn Bousinessq At present, a variaty of methods are used to break rock in surface mines such as: drilling-blasting, mechanize, physical, chemical or hydraulicking, etc Most of open pit mines in Vietnam are used drillingblasting method to break rock and the result of it is high However, in several surface mines have extraction sites in close the residential area, historic monuments, etc, sometimes the drilling-blasting method is not effective At that period, if not use other methods to break rock, the boundary of open pit mine Vifill be narrowed, loss of i enviromental resources and damage to ; economic In this case, the author proposed : the breaking rock method is using hydraulic breaker (hydraulic hammer) and apply the results of the Bousinessq mathematical problem to determine and simulate about breaking rock processing of hydraulic breaker in open pit mines CI)NGNGHIIPM6,SA4-2OIS ... vd ddt da tren tdng ciJa ddu dfp thuy lu''c theo k i t qua cua bai toan Bousinessq Td cac kit qua tinh todn theo faai todn Bousinessq tren, tdc gia sd dung dng dgng 3D Max d l md phdng, minh hga... vd d i t dd tren cde md Id thien CDng vdi vifc nghien edu dng dgng bdi todn Bousinessq vd dp dgng kit qua eua bai todn Bousinessq, cho phep tinh todn cde thdng s l cua ddu dfp thOy lyc phij hyp... dap thuy luc theo kit qua cua bai toan Bousinessq H Md phong qud trinh pha vd dat da tnjc tiep tren ting bang diu dap thuy luc theo ket qud cOa bdi todn Bousinessq At present, a variaty of methods