近距离煤层出煤柱矿压显现规律数值模拟  

Numerical Smiulation of Mine Strata Pressure Behavior Law During Working Face out of Pillar in Close Distance Seams

作　　者：杨军辉[1] 鞠新颖 冯泽康[3] 朱涛 赵力[3] 杜晓武[3] 

机构地区：[1]冀中能源股份有限公司邢东矿,河北邢台054001 [2]内蒙古玉龙矿业股份有限公司,内蒙古锡林郭勒026200 [3]中国矿业大学(北京)资源与安全工程学院,北京100083 [4]神华包头能源有限责任公司万利一矿,内蒙古鄂尔多斯017002

出　　处：《煤炭技术》2017年第1期42-44,共3页Coal Technology

基　　金：国家自然科学基金资助项目(51234005;51504259);中央高校基本科研业务费专项资金资助项目(2010QZ06);国家大学生创新训练资助项目(C201601024)

摘　　要：基于晋华宫矿浅埋近距离煤层7-4#煤8709工作面开采出上覆遗留煤柱的工程背景,以FLAC3D模拟软件模拟了近距离煤层工作面出煤柱时,覆岩垂向应力时空演化规律。结果表明:工作面在推进至距煤柱边界-12.5~0 m时,工作面覆岩垂直压应力值先急剧增大后缓慢减小;在距煤柱边界-5 m时应力集中系数达到最大值2.22,此时工作面极易发生大面积冒顶,甚至压架事故。On the basis of the engineering background that the 8709 working face of 7-4# coal seam passes through the upper coal pillar in close distance shallow seams of Jinhuagong coal mine, spatial and temporal evolution law of vertical stress of the overlying strata are simulated by the software FLAC3D. The results show that when the working face is -12.5~0 m distant from the upper coal pillar boundary, the vertical compressive stress value of the working face increases rapidly and then decreases slowly. The maximum stress concentration factor is 2.22 when the working face is -5 m distant from the upper coal pillar boundary.

关 键 词：近距离煤层 出煤柱 应力集中 超前注浆 

分 类 号：TD823.5[矿业工程—煤矿开采] TD322[矿业工程—矿山开采]