外文翻译采场底板岩层应力的分析模型及应用

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1、第20页英文原文：AnalyticalmodelandapplicationofstressdistributiononminingcoalfloorZHUShu-yun1，JIANZhen-quan1，HOUHong-liang2，XIAOWei-guo1，YAOPu11SchoolofResourcesandEarthScience，ChinaUniversityofMining&Technology，Xuzhou，Jiangsu221008，China2DepartmentofPreventionandTreat

2、mentforCoalMineWater，ZhengzhouCoalGroupLtdCo，Xinmi，Henan452371，ChinaAbstract：Giventheanalysisofundergroundpressure，astresscalculationmodelofcolafloorstresshasbeenestablishedbasedonatheoryofelasticity．Themodelpresentsthelawofstressdistributionontherelativelyfixed

3、positionoftheminingcoalfloor：theextentofstressvariationinafixedfloorpositiondecreasesgraduallyalongwithdepth．Thedecreasingrateoftheverticalstressisclearlylargerthanthatofthehorizontalstressataspecificdepth．Thedirectionofthemaximumprincipalstresschangesgraduallyf

4、romaverticaldirectiontoahorizontaldirectionwiththeadvanceoftheworkingface．Thedeformationandpermeabilityoftherockmassofthecoalfloorareobtainedbycontrastingthedifferenceoftheprincipalstressestablishedfromtheoreticalcalculationswithcurvesofstress-strainandpermeabil

5、ity-strainfromtests．Whichisanimportantmechanicalbasisforpreventingwaterinrushfromconfinedaquifers．Keywords：model；coalfloor；stressdistribution；analysis1IntroductionWiththedevelopmentofcoalseammining，Thestressfieldofrockstrataofcoalseamfloorswillchangeandcontinuet

6、oberedistributedbecauseoftheeffectofmining．Theresultswill　bringonfloordeformation，displacementandpossibledestructiontoattainanewbalance[1]．Astudyofthelawofstressdistributionoffloorshasimportant，practicalimplicationsinunderstandingdeformationanddestructivecharact

7、eristicsandpredictingwaterinrushfromfloorsandfordesigningsuitablelocationsfortunnelsandselectingmaintenancemethodswhendepthincreased．Atpresent，thestudyofthelawofstressdistributionoffloorsmostlyproceedsfromanumberofcalculationsbasedonfiniteelementanalysesandsimil

8、armaterialtests[2-6]．Inthispaper，thestudyofstressdistributionoffloorsinrelativelyfixedpositionsisdiscussedanalyticallywithatheoryofelasticityandwepresentanapplication