孤岛煤柱卸压开采对下伏大巷围岩稳定性的影响研究  

Influence of isolated coal pillar pressure-relieving mining on surrounding rock stability of underlying main roadway

作　　者：邢瑞军[1,2] 孟宪锐[1] 王鹏[3] 

机构地区：[1]中国矿业大学(北京),北京100083 [2]开滦(集团)有限责任公司,河北唐山063001 [3]新疆工程学院,新疆乌鲁木齐830023

出　　处：《煤炭工程》2017年第8期117-119,共3页Coal Engineering

基　　金：国家自然科学基金项目(51404270);中央高校基本科研业务费专项资金项目(2011QZ06);新疆维吾尔自治区高校科研计划项目(XJEDU2016S089)

摘　　要：为了保证孤岛工作面回采过程中下伏大巷围岩的稳定,结合孤岛煤柱的防冲和下伏大巷围岩控制技术,探讨采用超前钻孔卸压的方法对开滦集团东欢坨矿孤岛煤体进行回收。并运用FLAC3D进行数值模拟研究,分析了不同钻孔深度对工作面卸压效果以及卸压前后下伏大巷围岩状态的变化。结果表明,当卸压钻孔长度为30m时,工作面卸压效果最为理想,下伏大巷围岩状态最佳。In order to ensure the stability of surrounding rock of under lying roadway during island coal face mining. The paper combined rock burst prevention for isolated coal pillar and surrounding rock control for the underlying roadway, and discussed the feasibility of advance drilling pressure - relieving in island coal recovery in Donghuantuo Coal Mine of Kailuan Group. FLAC3D numerical simulation was applied to analyze the influence of borehole depths on the pressure - relieving effect in the island face and the state of surrounding rock in the underlying roadway before and after unloading. The result showed when the borehole depth was 30 m, pressure - relieving effect of the island face and the surrounding rock condition of the underlying main roadway are the best.

关 键 词：孤岛煤柱 卸压开采 下伏大巷 围岩控制 数值模拟 

分 类 号：TD322[矿业工程—矿井建设]