赛尔四矿易冒落顶板锚杆支护参数的数值模拟

摘要

采用FLAC3D有限差分软件，对徐矿新疆赛尔公司四矿B9煤层易冒落顶板回采巷道在不同锚杆长度和直径下围岩破坏变形规律进行数值模拟研究，系统分析了工作面应力分布、回采巷道变形分布规律及回采巷道锚杆合理支护参数。结果表明：工作面支承压力分布超前约30 m，在此范围内，回采巷道变形显著，此区段需进行超前支护；合理的锚杆支护参数是锚杆长度为1.8m、锚杆直径为18 mm。%By using FLAC3D software, deformation failure regularity of surrounding rock in mining roadway with easy caving roof under different length and diameter of bolt was simulated , the stress distribution of mining face , deformation distribu-tion laws and bolt reasonable supporting parameters of mining roadway systematically analyzed .The research results show that advanced abutment pressure is about 30m which needs advanced supporting , the reasonable bolt supporting parameters are that the bolt length is 1.8m and the bolt diameter is 18mm.