采矿工程数值模拟模型左右边界位置的探讨

陈晓祥,韦四江(,454003)*:采用UDEC数值模拟计算,对岩层移动模拟研究中确定不受采动影响巷道数值模拟模型左右边界位置的方法进行了研究.结果表明,当模型边界与巷道中心距离达到了巷道跨度的5倍后,继续加大模型宽度,对巷道顶底板移近量两帮移近量以及巷道顶板以上岩层底板以下岩层和两帮深部岩体的位移和应力影响很小,因此模型的左右边界应取在距离巷道中心5倍巷道跨度以外.若主要研究巷道的破坏状况,则模型边界可以近一些;若研究开采的影响状况,则到边界的距离要远一些.:采矿工程;数值模拟;模型;边界位置:TD325:A:1673-9798(2008)01-0153-06Thediscussionaboutnumericalsimulationmodels'left-rightboundarypositionofminingengineeringCHENXiao-xiang,WEISi-jiang(SchoolofEnergyScienceandEngineering,HenanPolytechnicUniversity,Jiaozuo,454003China)Abstract:ByusingUDECsoftware,themethodofdeterminationsonthenumericalsimulationmodels'left-rightboundarypositionoftheroadwaythathavenoinfluencebyminingwheninsimulatingstratamovementwerestudied.Theresultsshowthattheinfluenceontheroof-to-floorconvergence,theside-to-sideconvergence,thestratastressanddisplancementofaboveroo,fnetherflooranddeepterreneintwosidesaresmal,lwhenbroadeningthemodel'sbreadthunceasinglyafterthedistancebetweenmodel'sboundaryandroadwaycenterreachtofivetimesroadways'breadth.So,themodels'left-rightboundarypositionmaylocateinabovefivetimesroadways'breadthfromroadwaycenter.Whenstudythecrackingstatusofgateway,modelboundarycanbeclosetogateway,whilestudytheinfluencingconditionofmining,itshouldbefaroffgateway.Keywords:miningengineering;numericalsimulation;mode;lboundaryposition0,.,,,,,,.,27220084()JOURNALOFHENANPOLYTECHNICUNIVERSITY(NATURALSCIENCE)Vo.l27No.2Apr.2008*:2008-02-10:(2008A440006);(648234).:(1979-),,,,,.E-mai:[e-mail][1-5],,,.,,.,,?,,;,.,2.,,.,,.1,.,:,,,;();!,,.,,,[6](12).2:(r+dr)(r+dr)d-rrd-2tdrsind2=0,(1),t,r;r,.r-t+rdrdr=0.(2)(3)(4)[7]:r=dudr,t=ur,(3)t=1E[t-!(r+z)]r=1E[r-!(1+z)],(4)154()200827,z.(2)(3)(4):r=∀H(1-r21r2),t=∀H(1+r21r2),(5)(5),t1.051r0.951,tRi=20r1∀5r1;10%,tRi∀3r1.22.1,,.:,9,1Tab.1Numericalprocedure123456789L/m1r2r2.5r3r4r5r7r20r50r2Tab.2Valuesofrockparametersinthenumericalmodels/MPaC/MPaE/MPa#/(#)∃∀/(kg∃m-3)/MPa459.612000400.22500392.63000300.2814000.9307.310000380.23250025000MPa,3000MPa,1.5MPa1(r).,2.2.2400m,∀H10MPa,,5MPa;,4m,3m;;10Mpa,;,,,-.,.,,,,*.sav.,,.3,3(123),19,.3(123),11m,6m4m,11,1216y.3.134512y3x.121552:3,,;3,,126mm23mm54mm;35,,123,117mm24mm37mm;5,,123,12~7mm,21~3mm,31~2mm,,,5,,123,,,.678123.13:(1),1y3x,.3m,,3m.(2),,.5,,13,6r7r20r50r,,,5,13,,13,.2:(1),y,.(2)0.545my,,0.545my.5,,2,6r7r20r50r,,5,2y,,2.3.291011123Syy.12Syy:(1),y,.(2),y,156()2008275,,12,6r7r20r50r,Syy,,,5,12y,,12y,.3Syy:(1),y,,.,,,.1572:(2),y,5,,3,6r7r20r50rSyy,,5,3y,,,3y,.123SxxSyy.5,123Sxx,.4(1)1.050.95,5;10%,3.(2),5,,.(3),5,,.(4),5,,,.(5),5.,,;,.(6),,.:[1].[D].:,2004:14-44.[2],,.[M].:.2005:36-54.[3],.[J].,2007,35(4):96-99.[4],,,.[J].,2006,24(6):73-76.[5],.[J].,2007,27(1):20-24.[6],.[M].:.2003:48-50.[7].[M].:.2007:52-56.[8],,.[J].,2001,30(3):252-255.(责任编辑宫福满)158()200827