摘要
曙光煤矿煤层底板层理发育,1208孤岛工作面回采巷道底板受支承压力影响大,引发底板产生剪切滑移。基于岩体力学理论,计算了巷道底板的破坏深度,分析了不同阶段孤岛工作面底板破坏的区域;运用FLAC3D软件分析了巷道围岩在不同回采阶段的支承压力集中系数,根据塑性区分布特征,得出了孤岛工作面回采期间巷道的破坏类型、巷道底板的破坏类型和破坏深度。
The mining roadway floor of 1208 isolated working face was affected seriously by bearing pressure in Shuguang Coal Mine＇s seam floor with bedding development,causing the floor shear sliding.Based on the theory of rock mechanics,the broken floor depth of mining roadway was calculated and the floor breaks zone in the isolated face at different stages were analyzed.The bearing pressure concentration factors of roadway surrounding rock at different mining stages were analyzed by FLAC3D software,according to the distribution characteristics of plastic zone,the failure type of roadway and the failure type and broken depth of roadway floor during isolated face extraction were obtained.
出处
《中国煤炭》
北大核心
2016年第8期52-55,共4页
China Coal
关键词
孤岛工作面
回采巷道
层状岩层
底鼓
破坏深度
isolated working face
mining roadway
layered stratum
floor heave
broken depth
