预览加载中,请您耐心等待几秒...
1/10
2/10
3/10
4/10
5/10
6/10
7/10
8/10
9/10
10/10

亲,该文档总共15页,到这已经超出免费预览范围,如果喜欢就直接下载吧~

如果您无法下载资料,请参考说明:

1、部分资料下载需要金币,请确保您的账户上有足够的金币

2、已购买过的文档,再次下载不重复扣费

3、资料包下载后请先用软件解压,在使用对应软件打开

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