深井開采礦柱穩(wěn)定性分析與可視化驗證.pdf

1、中南大學碩士學位論文深井開采礦柱穩(wěn)定性分析與可視化驗證姓名：張保申請學位級別：碩士專業(yè)：安全技術及工程指導教師：羅周全20090401碩士學位論文ABSTRACTABSTRACTPillarisanimportantstructuralunitofdeterminingthestopestabilityitplaysasupportingroleintheminedareaItnotonlymaintainsthestabilityof

2、roofandsurroundingrock，butalsohavegreatpotentialofimprovingtherecoveryrateoforeAtpresent，owningtominingoftakeoneeveryotherone”andlagfillingwork，thestabilityofpillarsisincreasinglyoutstandinginDongguashanCopperMineAiminga

3、ttheproblemofpillarstabilityunderhighstressindeepwellofDongguashanCopperMine，usingthemethodsoftheoreticalanalysis，numericalsimulationandfieldmeasurement，thepapercarriesouttheresearchasfollows：(1)Basedontwofreefacingpilla

4、rwhichisformedafterthedeepstopemininginDongguashanCopperMine，applyingdamage—fracturemechanicsPrinciple，itisanalyzedthatthedamagemechanismandevolutionoftherockpillarmassfractureunderhighstressinthedeepwell；Usingthedynamic

5、RockdynamicdamagesoftwareRFPA2u，thefailureprocessoftwofreefacingpillarissimulated，whichprovidesthebasisforpredictingtheStabilityoftwofreefacingpillarunderhighpressure(2)UsingsimulationsoftwareMidas／GTS，anumericalsimulati

6、onmodelissetupThesimulationof“takeoneeveryotherone’’recoveryprocessofDongguashanCopperiscardedoutThechangesofstress，displacement，plasticzoneofthepillarandsurroundingrockarerevealedAlso，thepossibledangerouspositionsofpill

7、arandsurroundingrockduringminingareanalyzed(3)Using3Dlaserdetection(CMS)technologyand3Dmodelingtechnique，3DshapeofgoafandpillarareobtainedrapidlyandaccuratelyItverifyvisuallynumericalsimulationresultsofthepillarstability

8、oftwofreefacingpillarandminingoftakeoneeveryotherone，(4)Accordingtotheresultof3Dlaserdetection，basedonsoftwareSurpac，visualcalculationofthecollapsevolumeandaccuratedelineationofthepillarcollapsescopearerealizedThecollaps