大断面煤巷变形破坏规律及控制技术  

Deformation and failure law and its control technology of roadway with large section

作　　者：周志利[1] 柏建彪[2] 肖同强[2] 许磊[2] 张科学[2] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083 [2]中国矿业大学煤炭资源与安全开采国家重点实验室矿业工程学院,江苏徐州221008

出　　处：《煤炭学报》2011年第4期556-561,共6页Journal of China Coal Society

基　　金：煤炭资源与安全开采国家重点实验室自主研究课题资助项目(SKLCRSM08X04);全国博士学位论文作者专项资金资助项目(200760);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：采用理论分析、FLAC3D数值计算和工程实践等方法,研究分析巷道宽度对巷道围岩变形、塑性区及应力分布的影响规律,提出了巷道临界宽度判定指标:巷道顶板拉破坏深度为1.5 m,顶板拉破坏深度大于1.5 m的巷道维护困难。并提出了超过临界宽度的巷道支护技术为:及时支护、高强高预紧力锚杆、锚索支护和高初撑力的临时支护。研究成果成功应用于王庄煤矿6207综放工作面运输巷。Theoretical analysis,FLAC3D numerical calculation and engineering practices were used to research the influence laws of roadway width on surrounding rock deformation,plastic zone and stress distribution.The method of roof pull failure depth as an index to determine roadway critical width were put forward.The roadway width index is roof tension failure depth 1.5 m.When the roof tension failure depth is large than 1.5 m,the roadway is difficult to support.And roadway support technology of more than critical width was given,as timely support,high strength and high pre-stressed bolt and cable support,and high setting load temporary support.Research results were successfully applied to 6207 fully-mechanized top caving working face transport roadway of Wangzhuang Coal Mine.

关 键 词：大断面煤巷 围岩稳定性 临界宽度 支护技术 

分 类 号：TD322.4[矿业工程—矿井建设] TD353