近距离煤层煤柱集中应力传递及巷道分区支护对策研究

摘要

To the studying development and mining state of contiguous coal seam group in home, it taking practical situation of Duerp-ing coal mine in Xishan coal district as engineering background, then the influence that residual coal pillar stress concentration to the stress distribution state of bottom strata after upper coal seam mined were analyzed by theory analysis and numerical simulation, the transmission law that coal pillar concentration stress in different coal pillar size and different floor depth transmitted in bottom floor were analyzed, different stress regions were divided according stress distribution characters of bottom strata, then roadway supporting meas-ures under different surrounding rock stress condition were put forward, then practiced in field, supporting results was good.%针对我国近距离煤层群开采现状和研究进展情况,以西山矿区杜儿坪矿实际条件为工程背景,采用理论分析和数值计算相结合的方法,分析上部煤层开采后残留煤柱集中应力对下部岩层应力分布状态的影响,分析不同煤柱尺寸、 不同底板深度条件下煤柱集中应力在下部底板中传递规律,根据下部岩层应力分布特征划分不同应力区域,提出不同围岩应力条件下巷道支护对策,并进行井下工业试验,取得良好的支护效果.