外文翻译--综放沿空掘巷卸压技术研究.doc

英文原文Studyondestressingtechnologyforaroadwaydrivenalonggoafinafullymechanizedtop-coalcavingfaceAbstractBasedonthedeformationcharacteristicsoftheroadwaysdrivenalonggoafinfullymechanizedtop-coalcavingfaces,theauthorconsidersthatitisthekeytoensurethestabilityofsurroundingrocksofroadwaydrivenalonggoaftocontrolthedeformationduringtheperiodaffectedbymining.Consideringthecharacteristicsoftheroadwaylayoutinfullymechanizedtop-coalcavingfaces,atechnicalschemeofdestressingisputforwardandthedestressingeffectisanalyzedbyusingthesoftwareofUniversalDistinctElementCode3.0(UDEC-3.0).Keywordsfullymechanizedtop-coalcaving,gob-sideentrydriving,roadwaylayout1．Deformationcharacteristicsofthegob-sideentryinafullymechanizedtop-coalcavingfaceInthelightofkeystratumtheoryandthelawofoverlyingstratamovement,weknowthatalongthedipdirectionthemainroofbrokeincoalwallofthelowerdistrictsublevelandformedarockbeamstructurecalledbigstructureofsurroundingrocksaftertheupperdistrictsublevelisextractedforward.Atthesametime,thepeakofsideabutmentpressureistransferredtothedepthawayfromtheperipheryalongthedipdirectionandthecoalbodyunderthebigstructureliesinstress-relaxedareawherethegob-sideentryislaidout,asshowninFig.1.Thestabilityanalysisofthebigstructureofsurroundingrocksandfieldsurveysallshowthatthedeformationlawoftheroadwaydrivenalonggoafinfullymechanizedtop-coalcavingfacesobviouslydiffersfromotherkindsofentries.Themaincharacteristicsarelistedasfollows[1,2].Fig.1Thestructurerelationshipbetweengob-sideentryandoverlyingstratainafullymechanizedtop-coalcavingface(1)Duringtheperiodofroadwayexcavation,thedeformationlawofthegob-sideentryinafullymechanizedtop-coalcavingfaceissimilartothatofgeneralsoftrockroadway.Theroadwayexcavationplaysalittleeffectonthestabilityofthebigstructure.Thegob-sideentryoccurscertainvalueofdeformationbecausethestressaroundtheroadwaychangesandcomesoutstressconcentrationbyroadwayexcavation.(2)Duringtheperiodafterroadwayexcavationandbeforeminingeffect,thebigstructureofsurroundingrocksisstable