采矿工程专业毕业论文外文翻译

采矿工程专业毕业论文外文翻译

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时间:2018-10-19

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1、英文原文:AnalyticalmodelandapplicationofstressdistributiononminingcoalfloorAbstract:Giventheanalysisofundergroundpressure,astresscalculationmodelofcolafloorstresshasbeenestablishedbasedonatheoryofelasticity.Themodelpresentsthelawofstressdistributionontherelativelyfixedpositionoftheminingcoalfloor:the

2、extentofstressvariationinafixedfloorpositiondecreasesgraduallyalongwithdepth.Thedecreasingrateoftheverticalstressisclearlylargerthanthatofthehorizontalstressataspecificdepth.Thedirectionofthemaximumprincipalstresschangesgraduallyfromaverticaldirectiontoahorizontaldirectionwiththeadvanceoftheworki

3、ngface.Thedeformationandpermeabilityoftherockmassofthecoalfloorareobtainedbycontrastingthedifferenceoftheprincipalstressestablishedfromtheoreticalcalculationswithcurvesofstress-strainandpermeability-strainfromtests.Whichisanimportantmechanicalbasisforpreventingwaterinrushfromconfinedaquifers.Keyw

4、ords:model;coalfloor;stressdistribution;analysis1IntroductionWiththedevelopmentofcoalseammining,Thestressfieldofrockstrataofcoalseamfloorswillchangeandcontinuetoberedistributedbecauseoftheeffectofmining.Theresultswill bringonfloordeformation,displacementandpossibledestructiontoattainanewbalance[1

5、].Astudyofthelawofstressdistributionoffloorshasimportant,practicalimplicationsinunderstandingdeformationanddestructivecharacteristicsandpredictingwaterinrushfromfloorsandfordesigningsuitablelocationsfortunnelsandselectingmaintenancemethodswhendepthincreased.Atpresent,thestudyofthelawofstressdistr

6、ibutionoffloorsmostlyproceedsfromanumberofcalculationsbasedonfiniteelementanalysesandsimilarmaterialtests[2-6].Inthispaper,thestudyofstressdistributionoffloorsinrelativelyfixedpositionsisdiscussedanalyticallywithatheoryofelasticityandwepresentanapplicationcombinedwithactualdataofaparticularsite.2

7、FundamentalprincipleTheformulasofstressdistributionarederivedfromthesuperpositionprinciple,giventhetheoryofelasticityondistributedloadsonasemi-infiniteplane[7-8].TheverticaldistributionloadofABonasemi-infiniteplaneisas

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