Instabilitymechanismandengineeringcasesofsurroundingrockindeephighstress,Weakstratacaverns
Instabilitymechanismandengineeringcasesofsurroundingrockindeephighstress,Weakstratacaverns.pdf
Surroundingrockofcavernsindeephighstressconditionhavethecharac-teristicsoflongdeformationduration,largelooseningrangeandlargedeformation.Itisdifficulttocontrolcaverns'deformationwithconventionalsupportmethods.Deformationandfailuremechanismisasfollows:strongcreepofweakrockinhighstresscondition,fracturedsupportstructuresgradually,untilsupportfailure,evenrooffall.Onthebasisofmanyyearsofengineeringpractice,thispaperanalysesthestratapressurecharacter-isticsandinstabilitymechanismofthreetypicalpumpcaverns.Conceptofreconstructedbearinglayerwasproposed.Thesecavernsare-250mpumpcaverninSino-ThaiCompany,39miningareapumpingcavernaffectedbylargefaultinZhongmacunCoalMine,-800mPumpcavernofZhaoguNo.2CoalMine.Combinedwiththereinforce-mentprincipleofsurroundingrockofcavern,rebuildingbearingstratawaspro-posed.AndmultiplesupportonthebasisofNewAustrianLawwassuggested.Thetypi-calsupporttechnologyinZhaoguNo.2Coalmineisfourtimesupports.Andtheprimarysupportisbolt-anchorcable-steelbeam.Thesecondarysupportofsurroundingrockisgrouting,whichcanstrengthenstrata.Thethirdsupportofsurroundingrockisdouble-deckI-shapedsteelbracket.Andthefourthsupportisshotcrete,whichcansealedstrata.Fieldinvestigationshowsthatthesurroundingrockofpumpcavernshavebeeneffectivelycontrolled.Andgoodtechnicalandeconomicbenefitshavebeena-chieved.
作者：WEISijiangGAOPeichengWANGChongyangZHANGSheng
作者单位：SchoolofEnergyScienceandEngineering,HenanPolytechnicUniversity,JiaozuoHenan454003,China
母体文献：38届国际采矿岩层控制会议论文集
会议名称：38届国际采矿岩层控制会议
会议时间：2019年10月1日
会议地点：太原
主办单位：中国煤炭学会,国家自然科学基金委员会,中国矿业大学
语种：chi
分类号：
关键词：highcrustalstresslarge-sectioncavernfracturedbearinglayermultiplesupport
在线出版日期：2022年8月19日
基金项目：
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