近距离房采煤柱下长壁工作面压架机理  

Support Crushing Mechanism at Longwall Working Face Under Close Distance Room Mining Pillars

作　　者：卫斐[1] 魏坤[1] 孔鲁[1] 陈田[1] 王傲[1] 

机构地区：[1]中国矿业大学矿业工程学院,江苏徐州221116

出　　处：《煤矿安全》2016年第7期51-54,共4页Safety in Coal Mines

基　　金：中国矿业大学煤炭资源与安全开采国家重点实验室大学生科技创新计划资助项目(SKLMD2014004)

摘　　要：针对神东矿区大柳塔矿22202工作面可能存在顶板剧烈来压和压架事故等问题,采用理论分析和数值模拟方法研究长壁开采应力演化规律及压架机理。结果表明,工作面进入房采煤柱下方后,支承应力峰值点超前工作面距离会显著减小,造成顶板应力和超前支承峰值应力叠加,使应力集中更加明显。当工作面处于煤柱正下方时,如果顶板来压,在集中应力共同作用下将引发压架事故;在房采煤柱采空区边缘顶板运动不稳定,压架发生的规律性差;远离采空区边缘后,顶板来压的周期性明显,压架事故将会周期性地发生。For the issues of possible roof pressure and support crushing accidents at 22202 working face in Daliuta Coal Mine,theoretical analysis and numerical simulation were applied to study the mechanism of mining induced stress evolution and support accidents.The result shows that the advanced distance of bearing pressures＇ peak point will significantly reduce when working face enters into room mining pillar,which causes the superposition of roof stress and advanced bearing peak stress and further prompting considerably growth of the concentrated stress. When the working face is below the coal pillar,roof weighting and stress concentration contribute to support crushing accidents. On the edge of the coal pillars of mining gob,instability of roof movement can not lead to support crushing accidents. When the working face is away from the edge of the mining gob,the support crushing accidents will happen periodically because of the obviously periodical roof pressure.

关 键 词：房采煤柱 长壁开采 数值模拟 应力演化 压架机理 

分 类 号：TD823.5[矿业工程—煤矿开采]