深部复合顶板煤巷变形破坏机制及耦合支护设计

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1、维普资讯http://www.cqvip.com第26卷第5期岩石力学与工程学报Vb1．26No．5May，20072007年5月ChineseJournalofRockMechanicsandEngineering深部复合顶板煤巷变形破坏机制及耦合支护设计何满潮～，齐干，程骋，张国锋1，孙晓明(1．中国矿业大学力学与建筑工程学院，北京100083；2．中国地质大学工程技术学院，北京100083)摘要：煤矿开采进入深部以后，地质力学环境远比浅部复杂得多，由此引起的各种非线性力学现象越来越严重，给

2、深部支护与开采带来很大的难度。夹河矿2442工作面上材料道复合项板松散、破碎，采用原支护形式很难有效控制，进而加剧两帮收缩和底板臌起，严重影响巷道的正常掘进和安全生产。通过对该巷道工程地质条件的综合分析和地质力学评估，采用数值模拟和理论分析方法研究该类巷道的变形破坏机制，有针对性地提出锚网索耦合支护设计方案，现场试验结果表明该支护设计方案可取得良好的支护效果。关键词：采矿工程；深部煤巷；复合项板；耦合支护；数值模拟中圈分类号：TD353文献标识码：A文章编号：1000—6915(2007)05—

3、0987—07DEFoRMATIoNANDDAMAGEMECHANISMSANDCoUPLINGSUPPoRTDESIGNINDEEPCoALRoAD1lVAYWITHCoMPoUNDRooFHEManchao，2QIGan，CHENGCheng，ZHANGGuofeng，SUNXiaoming(1．SchoolofMechanicsandCivilEngineering，ChinaUniversityofMiningandTechnology，Beijing100083，China；2．Sch

4、oolofEngineeringTechnology，ChinaEfvPofGeosciences，Beijing100083，China)Abstract：Astheminingdepthincreasing，geologicalandmechanicalconditionsofroadwaybecomemorecomplicatedcomparedwiththoseinshallowroadway．Consequently，thenonlinearmechanicalphenomenaocc

5、urwithhighfrequency，whichbringsaboutgreatdificultiesfordeepengineeringsupportduringexcavationandmining．Theseproblemscausedbythedeepminingengineeringarethefocusesinthefieldsofminingengineeringandrockmechanics．Alotofachievementshavebeenobtainedbyschola

6、rsthroughtheoreticalstudy，experimentaltest，andin—situtest．Thelooseandcrackedcompoundroofofworkingface2442inJiaheCoalMineisdificulttocontrolbyusingtraditionalsupportmeasureswhichincreasethewallsshrinkandthefloorheaveandgreatlyafectthenormalexcavationa

7、ndsafeproduction．Basedonthein—situinvestigation，experimentaltest，analysisofengineeringgeologicalconditions，geomechanicalevaluationandnumericalsimulation，thedeformationanddamagemechanismsoftheroadwayareanalyzed；andthenthebolt·-mesh·—cablecouplingsuppo

8、rtdesignisputforward．Theresultofin—situtestshowsthatthenewdesignCanultimatelyguaranteethestabilityofdeepcoalgateway．Thedesignschemeofbolt—mesh—cablecouplingsupportisfeasibleandeficientforthestabilitycontrolofsurroundingrockindeepminingengineering．Key