深井节理化围岩巷道破坏机理及控制技术-IngentaConnect.PDFVIP

　 第37卷第9期 煤　 　 炭　 　 学　 　 报 Vol.37　 No.9　 　 2012年 9月 JOURNAL OF CHINA COAL SOCIETY Sep.　 2012　 - - - 　 　 文章编号:0253 9993(2012)09 1559 05 深井节理化围岩巷道破坏机理及控制技术 郭建 伟1,2 (1． 中国矿业大学 安全工程学院,江苏 徐州　 221008;2． 中国平煤神马集团能源化工研究院,河南 平顶山　 467000) 摘　 要:针对平顶山矿区深井巷道稳定性控制问题,以典型节理化围岩巷道为研究对象,采用离散 元数值模拟方法研究了巷道围岩的变形破坏过程,分析了其破坏机理,提出了巷道围岩控制技术。 研究表明:巷道首先在拱顶、底板中央区及两侧边墙受张拉破坏,拱肩及两侧底角受剪破坏,破坏区 范围逐渐向深部扩展直至失稳。 现场实测数据表明:在方案实施2 个月后,锚杆、锚索受力在较高 值趋于恒定,充分发挥了支护作用;水平收敛、拱顶下沉和底臌趋于稳定,大规模松软巷道围岩稳定 性得到有效控制。 关键词:深井;节理化围岩;巷道;破坏机理;控制技术 中图分类号:TD322．4;TD353　 　 　 文献标志码:A Roadway fracture mechanism and control technology ofjoint fissured surrounding rock in deep mines GUOJian-wei1,2 (1．Faculty of Safety Engineering,China University of Mining and Technology,Xuzhou　 221008,China;2．Energy ChemicalIndustryResearchInstitute,China PingmeiShenma Group,Pingdingshan　 467000,China) Abstract:Aimed at thestabilityof surroundingrockinPingdingshanCoalMine,tookatypicaldeeproadwaywithjoint fissured surrounding rock as study object,used discrete element numerical simulation,simulated the deformation and failure mechanism of surrounding rock,and the control technologies of joint fissured surrounding rock roadway were proposed.The results show that the tensile failure appears at vault and two side-walls and in the middle of floor at first.Then,the shear failure appears at spandrel andtwo base angles.Thefailurezone extendsintothe deep areauntil the roadway is instable.According tothe in-situ monitor data,it isconcludedthat the stressin anchor and cabletends to be stable after supporting for two months,as well as the horizontal convergence,vault subsidence and floor h