碎裂矿段层间采动应力规律与优化.pdf

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1、31卷第5期矿冶工程V()l3l№52(111‘F10月MININGANDMETALLURGICALENGINEERINGOctober2OI1碎裂矿段层间采动应力规律与优化胡建华，罗先伟，周科平，张绍国，黄应盟(1．中南大学资源安全I程学院，湖南省深部金属矿开发与灾嵩控制重点实验室，湖南长沙410083；2．，高峰矿Ik6-限责任公司，J一四河池547205)摘要：心川Phase2I)刈『岛峰矿100延伸矿体进行厂空允填影响下的碎裂矿段问_)F采应力研究，获取r蹿裂矿段rlln0和卜／f川f：采顺序下的采动应力

2、迁移规律。数值模拟结果疆爪，下向式开采t要表现Ⅲ叫的应效，夫J力刊18MPa，低lr』抗』K强度，故人拉应力值为0．47MPa，低下顶板充填体的抗拉强度1．2MPa，能够扶得较“的安个系数，L为1．57；而在f：向式的采矿过程中，开采过程j三要表现出扎应效应，最大的拉麻力为0．79MPa，低r顶板矿的{_J'【．托度，人J_J顺极刺结Jl=f=J的抗强度，会导致弱结构面受拉破坏，形成顶板失稳。研究结果表明，在同的采顺序，J』f采的托／J效庸，仃利于顶板矿体中弱结构而的发育与扩展，形成f层顶板的冒落，影响采场的采矿

3、安全乍，‘作、。为合删优化乐力，收采场的拉』、力状念和承载结构，应选择下向式回采对碎裂矿段进行L口J采。关键词：碎裂矿段；采动庸；数值模拟；开采顺序优化中图分类号：TD31l文献标识码：A文章编号：0253—6099(2011)05—0018—04LawsandOptimizationofInterlayerMining-inducedStressinFragment0reSectionHUJian—hua。，LUOXian—wei，ZHOUKe—ping，ZHANGShao—guo，HUANGYing—meng

4、(1．HunanKeyLabo／MineralResourcesExploitationandHazardControlforDeepMetalMines，SchoolResourcesandSafetyEngineering，CentralSouthUniversity，Changsha410083，Hunan，China；2．GuangxiGa(ngMiningCoLtd，Hechi547205，Guangxi，China)Abstract：ResearchhasbeendonewithPhase2Donth

5、emining—inducedstressbetweenfragmentoresectionsafterback—fillinggoalsin100extendedore—body，withnlovinglawofmining—inducedstressinfragmentoreseetionsduringovel’一ham1antlunderham1miningobtained．Resultsfromnumericsimulationtestsshowedthat(1uringunderhandminiug．t

6、herewasanobviouseonlpressionstressofmaximally18MPa，whichwaslowerthanthecompressirestrength，andatensilestt‘essofmaximally0．47MPa，whichwaslowerthanthetensilestrength(1．2MPa)ofruot’fillingbody，soasafetycoeficientupto1．57couldbeobtainedforthefilling—bodyroof．Whil

7、eduringoverhandmining，therewasadominanttensilestressof’maximally0．79MPa，whichwaslowerthanthetensilestrengthofFoot"andhigher’lhantheshearstrengthof’weaksh’ucturalplaneinroot’．resultinginroofunstableduetothedestructionofweakstmeturaIplaneundertheimpactot‘tensil

8、estress．ItwasconcludedthattensilestressduringoverhantiminingcontI’ibutingtothe(1evelopmentandexpansionofweakstructuralplaneinroofrockbody．wouldresultintherooffallingandminingopera—lionuns