复合顶板松软煤层巷道破坏机理及高预应力支护技术  

Roadway Failure Mechanism and High Prestressed Supporting Technology in Soft Coal Seam With Composite Roof

作　　者：路之浩 冯国瑞[1] 丁国利 

机构地区：[1]太原理工大学矿业工程学院,山西太原030024

出　　处：《煤矿安全》2014年第4期92-95,共4页Safety in Coal Mines

基　　金：国家自然科学基金面上资助项目(51174142);教育部新世纪优秀人才支持计划资助项目(NCET-11-1036);霍英东教育基金2011年高等院校青年教师基金应用研究课题资助项目(132023);山西省科技攻关资助项目(20110321015-03);山西省科技成果推广资助项目(2013071050);山西省优秀青年学术带头人资助计划项目

摘　　要：针对崇升煤矿采区巷道顶板为复合顶板,两帮强度低,传统棚式支护难以控制围岩变形量大这一问题,基于实验室力学性能测试及巷道围岩控制理论,采用理论分析及数值模拟计算的方法,对复合顶板松软煤层巷道的破坏机理及高性能预应力支护体系进行了研究,得出了巷道围岩连锁失稳、破坏机理及其相关解决技术。现场工业性试验表明,采用高性能预应力支护技术后,顶板下沉量为43 mm,两帮移近量为115 mm,离层量控制在33 mm以内,效果良好,得出高性能预应力锚杆支护可以较好控制复合顶板松软煤层巷道的围岩变形,提高巷道的整体稳定性。For the problems that composite roof and low intensity on both sides in Chongsheng Coal Mine roadway, using the traditional shed style supporting is difficult to control large rock deformation. Based on the mechanical testing and roadway control theory, soft coal seam composite roof failure mechanism and high performance prestressed support system is revealed by using theoretical analysis and numerical simulation methods. Roadway chain instability and failure mechanism and its associated solution is explained. Industrial test shows that roof subsidence is 43 ram, the moved closer amount of the roadway is 115 mm, separation is less than 33 mm when the high performance prestressed supporting technology is used. Conclusion is that the high performance prestressed bolting can control the sur- rounding rock deformation of the composite roof soft coal roadway and improve the overall stability of the roadway.

关 键 词：复合顶板 松软煤帮 破坏机理 数值计算 高性能预应力 锚杆支护 

分 类 号：TD353[矿业工程—矿井建设]