案例分析—用短壁开采的方式来回收煤柱-毕业论文外文文献翻译

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1、Exploitationofdevelopedcoalminepillarsbyshortwallmining—acaseexampleA.Kushwaha,G.BanerjeeCentralMiningResearchInstitute,BarwaRoad,Dhanbad826001,Jharkhand,IndiaAbstract:Theshortwallminingtechniqueissimilartolongwallminingbutwithshorterfacelengths,rangingbetween40an

2、d90m,withtheaimofcontrollingthecavingnatureoftheoverlyingupperstrata,theloadonsupportandtheoveralloperationofthesupportsappliedattheface.Fieldobservationsandthree-dimensionalnumericalmodellingstudieshavebeenconductedforthelongwallpanelextractionofthePassangseamatB

3、alrampurMineofSECLtounderstandthecavingbehavioroftheoverlyingupperstrata.AlargeareaofthePassangseamadjacenttothelongwallpanelshasalreadybeendevelopedviabordandpillarworkings.Inthispaper,numericalmodellingstudieshavebeenconductedtoassessthecavabilityoftheoverlyings

4、trataofthePassangseaminthemineoverdevelopedbordandpillarworkingsalongwiththesupportrequirementatthefaceandintheadvancegallery.Thecavingnatureoftheoverlyingrockscharacterizedbythemainfallispredictedforvaryingfacelengths,strataconditionanddepthsofcover.Thesupportres

5、istancerequiredattheface,theloadintheadvancegalleryanditsoptimalobliquitywereestimatedforfasterexploitationofthedevelopedpillarsintheBalrampurminebyshortwallmining.Keywords:Exploitation;Shortwallmining;Geo-mining;Obliquity;Blockcontours;Mainfall;Advancegallery1.In

6、troductionInIndia,undergroundcoalproductionismostlydependentupontheconventionalbordandpillar(roomandpillar)methodofmining,althoughtheoveralloutputpermanshift(OMS)throughthismethodisgenerallynotmorethan1toninanyofthemines[1].LargeareasinallthesubsidiariesofCoalIndi

7、aLimitedandeveninSingaraniCoalCompaniesLimited(India)havebeendevelopedviabordandpillarworkings.Thereisaneedtosearchforanewmethodofminingforthefasterexploitationofthesedevelopedpillarstoimproveproductivity.Inthispaper,theauthorshaveconducteddifferentnumericalmodell

8、ingstudiesusingFastLagrangianAnalysisofContinua(FLAC)software,toassessthecavabilityoftheoverlyingstrataofthePassangseaminBalrampurMineofSECL(India)overd