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ID:32187874
大小:8.18 MB
页数:78页
时间:2019-02-01
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1、中南大学硕十学位论文ABSTRACTAtthesecondminingstage.thefourthsegmentofMakengironmineisthemainorebody.Asthefirstminingorebodyisgoingtobedepleted,inordertosolvethemineproductionproblemfromthefirstminingtosecondmining,theminingoperatorsdesignedandconstructedsteppi
2、ngshaftonhangingwalloffourthsegmentBecausethesteppingshaftislocatedintherangeofsafetymining,itssafetymustbetakenintoaccountintheprocessofmining,inaddition,theorebodyisclosetoF2hugeFault,sowaterpreventionshouldbealsotakenintoaccountduringminingInthiss
3、tudy,thelarge.scalesimulationsoftwareFLAC3Dwasusedtoprobetheoptimizationofminingmethodselection,blastholeoptimizationstudy,recoverysequence,orebIockstructureparameters,theimpactofmininggnaftosteppingshaftaswellasminingprocesstosafetypillaroffourthseg
4、ment.Inthispaper,themainresearchwasasfollows:(1)ThefourthsegmentrockmechanicsparameterswereobtainedbyMakengorebodygeologicalconditionsfieldinvestigation,datacollection,rockmechanicsparameterstest.(2)Basedoninsituminingconditions,theAHP(analyticalhier
5、archyprocesslandthefuzzymathematicsmethodfondamentaltheorywereusedtocomprehensiveevaluationtheminingmethodsandoptimizedaminingmethodwithhighproductioncapacity,safety,economy,efficiency(3)Thestopestressanddisplacementwerecalculatedandanalyzedbyusingth
6、eFLAC3DsimulationsoftwareAndthestopestabilitywasinvestigatedbycalculation,therebydeterminingthereasonablestopestructureparameters(4)TheFLAC3DnumericalsimulationbasedontheANSYSinterfaceusedtheconfirmedstopestructureparameterstoobtaintheeffectsoforebod
7、yexcavationon1#steppingshaftAndthepillarsizex,vasobtainedthatcanmakesurethesafetyofshaftduringminingprocessbysettingfourpillarsbymonitoringthemaximumtensilestress,maximumcompressivestress,safetyfactorofthesteppingshaftandthe中南人学硕士学位论文displacementdist
8、ributionneartheshaft(5)TheblastingvibrationmayinfluencethesafetyofF2faultnearby,throughsimulationwithANSYSLS/DYNA,andthebestdistancebetweenstopeandsafetypillaroffaultwasgotKeywords:Makengironmine,fourthsegment,safetymining,numericalsimulation中南^学硕七学忙
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