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1、第25卷增刊巖土力學(xué)Vol.25Supp.22004年11月RockandSoilMechanicsNov.2004文章編號:1000-7598-(2004)增-0329-05ANSYS在煤礦開采數(shù)值模擬中應(yīng)用研究唐巨鵬,潘一山(遼寧工程技術(shù)大學(xué)力學(xué)與工程科學(xué)系,遼寧阜新123000)摘要:以典型礦井山東華豐礦、阜新五龍礦和北京大臺井為例,利用ANSYS有限元軟件,對煤礦開采引起的地表沉陷、沖擊地壓危險區(qū)域確定和俯偽斜采煤法參數(shù)優(yōu)化進(jìn)行了數(shù)值模擬分析。分別針對所處的地質(zhì)條件和賦煤狀況,建立了二維或三維有限元
2、模型,模擬計算了地表沉陷曲線和最大沉陷位置,指出山東華豐礦隨開采推進(jìn)沉陷位移和影響范圍將逐漸擴(kuò)大,最大沉陷位移逐步向開采方向前移的規(guī)律,當(dāng)開采800m時出現(xiàn)最大下沉速度3.5mm/d,最大沉陷位移為3.7m。五龍礦311面當(dāng)開采100m和400m時分別由于火成巖墻和應(yīng)力集中區(qū)貫通導(dǎo)致頂板易斷裂而極易發(fā)生沖擊地壓事故;大臺井俯偽斜采煤法煤層傾角只有在60o~67o時,推采距離才對煤層頂板法向最大壓應(yīng)力具有明顯影響,且頂?shù)装宸ㄏ蜃畲笪灰埔?guī)律為上部位移大于中部位移,西中部位移又大于下部位移,在煤層傾角70°時,工
3、作面超前支撐壓力作用范圍最小為30m,而下巷道支撐壓力作用范圍最大為25m,巷道數(shù)為3時,頂板下巷道超前支撐壓力峰值位置為5.3m。ANSYS計算結(jié)果表明,該數(shù)值模擬是合理的,與實際情況基本吻合,說明ANSYS在煤礦開采領(lǐng)域是一種有效的數(shù)值模擬工具。關(guān)鍵詞:ANSYS;煤礦開采;數(shù)值模擬;有限元分析中圖分類號:TD713.1文獻(xiàn)標(biāo)識碼:AApplicationofANSYSsoftwaretonumericalsimulationofcoalminingTANGJu-peng,PANYi-shan(Depa
4、rtmentofMechanicsandEngineeringSciences,LiaoningTechnicalUniversity,Fuxin123000,China)Abstract:TakingthetypicalcoalminessuchasHuafengofShandong,WulongofFuxinandDataiofBeijingofexamples,thesurfacesubsidenceinducedbycoalmining,thedangerousregionsdeterminatio
5、nofrockburstandtheparametersoptimizationofobliquesublevelconcentrationminingwerenumericallysimulatedbyusingANSYSsoftware.Accordingtothegeologyandcoalreserves,thetwo-dimensionalandthree-dimensionalmodelswereestablished.Thesurfacesubsidencecurvesandthemaxsub
6、sidencevaluespositionwerecalculatedforHuafengmine.Theresultsshowthatthesubsidencedisplacementsandinfluencedscopesincreasewithcoalmining.Thepositionofthemaxsubsidencedisplacementsgraduallymovestowardtheminingdirection.When800mweremined,themaxsubsidenceveloc
7、ity3.5mm/dappeared.Themaxsubsidencedisplacementsare3.7m.Inthe311workingfaceofWulongmine,when100mwereminedtherockburstwaseasytohappenastheigneousrockwalleffect.When400mwereminedtherockburstwasalsoeasytohappenastherooffailureinducedbythestressconcentrationre
8、gionsbreakthrough.Intheobliquesublevelconcentrationmining,onlycoalseamobliquitiesare60o-67o,theminingdistanceshaveobviouseffectonthemaxnormalpressurestressofroof.Therulesofnormaldisplacementsofroofandfloorare