摘要
针对石台矿Ⅲ313工作面回采巷道在工作面回采过程中围岩变形破坏的具体情况,采用数值计算、现场实测等研究手段,研究了大倾角工作面回采巷道围岩在工作面超前支承压力的作用下变形破坏的规律性和复杂性。结果表明,倾角增大不仅使回采巷道内围岩应力分布表现出与倾斜、缓倾斜煤层不同的特征,而且上下平巷矿压显现也不尽相同,其主要表现为运输平巷的集中应力大于回风平巷,给出了运输平巷和回风平巷超前支护的范围和巷道支护的关键位置。
Aiming at the situations of deformation and failure in the roadway surrounding rocks during the mining process of Ⅲ313 work- ing face in Shitai Mine, based on the resuhs of the numerical simulation and filed data, this paper studied the regularity and complexity of the deformation and failure of mining roadway surrounding rocks under advanced abutment pressure. The results show that character- istics of stress distribution of mining roadway surrounding rocks are different from inclined and gently inclined coal seams ; and pressure behavior are not the same in upper and lower drifts; the pressure in haulage drift is higher than tail roadway. The study provided the distance of advance support and the key position for roadway support.
出处
《煤矿安全》
CAS
北大核心
2014年第3期35-37,41,共4页
Safety in Coal Mines
基金
国家重点基础研究发展计划(973计划)资助项目(2013CB227903)
国家自然科学基金资助项目(51004109)
中央高校基本科研业务费专项资金资助项目(2010QZ02)
关键词
大倾角煤层
回采巷道
超前支承压力
超前支护
数值计算
large dip coal seam
mining roadway
advanced abutment pressure
advanced support
mumerical simulation
