为了分析工作面超前支承压力对下山的影响,采用理论计算、数值模拟,对晋城永安煤矿工作面超前支承压力分布规律进行了分析,确定了超前支承压力峰值位置为距材料下山30m外,高达19.55MPa,叠加影响应力集中系数最高达3~3.5,且对底板深部产生影响。确定了合理的停采线位置为距离材料下山60m,下山维护取得了良好的效果。
This paper applied theoretical calculation and numerical simulation to analyzing distribution rules of abutment pressure of mining face and its influence on dip in Yong'an Colliery. Then it determined rational end - mining line to make good supporting effect for dip.