大采高大跨度工作面护巷煤柱留设宽度合理性分析

Rationality Analysis of Chain Pillar Setting Width at Large Mining Height and Large Span Mining Face

为解决红柳林煤矿5#煤层护巷煤柱合理宽度留设问题,以该矿25202工作面为工程背景,通过弹塑性极限平衡理论分析得出煤柱留设理论宽度为14.8 m,并对不同煤柱宽度支承压力分布特征进行了模拟研究,确定了护巷煤柱合理留设宽度在15 m时可保持煤柱巷道的稳定性,其结果与现场实测数据相吻合。

In order to solve reasonable coal pillar width setting problem in Hongliulin 5# coal seam, taking 25202 working face as engi- neering background, coal pillar setting width is 14.8 m through plastic limit equilibrium theory; and abutment pressure distribution fea- tures of different coal pillar widths were simulated to ensure the stability of roadway when reasonable coal pillar setting width was 15 m, and the results were consistent with field data.