摘要
极近距离下层煤巷道布置受上部煤层采动影响明显,为了合理布置近距离下煤层巷道以及工作面间煤柱宽度,对回采巷道内错距离进行优化。本文以内蒙古宏景塔二矿近距离煤层地质条件为原型,采用FLAC3D数值模拟方法,分析了6-2上煤不同煤柱宽度下围岩应力集中、塑性破坏区分布规律。
The coal roadway arrangement in the lower layer of the very close coal seam is obviously affected by the mining of the upper coal seam.In order to reasonably arrange the roadway in the lower coal seam and the width of the coal pillar in the working face,the fault distance in the mining roadway is optimized.Based on the geological conditions of near-distance coal seam in Hongjingta No.2 Mine of Inner Mongolia,the distribution law of stress concentration and plastic failure zone of surrounding rock under different coal pillar width of 6-2 upper coal is analyzed by FLAC3D numerical simulation method.
作者
曹攀攀
Cao Panpan(China Coal Tianjin Design Engineering Co.,Ltd.,Tianjin 300120)
出处
《山东煤炭科技》
2020年第11期25-28,共4页
Shandong Coal Science and Technology
关键词
近距离
煤层
巷道
布置
close distance
coal seam
roadway
layout
