福达煤矿区段小煤柱合理宽度留设研究

Study on Retention Reasonable Width of Small Coal Pillar in Fuda Coal Mine Section

针对福达煤矿厚煤层开采区段煤柱煤炭资源损失较大问题,以该矿15204工作面为研究背景,通过采用现场钻孔窥视、实验室试验、理论分析及数值模拟等方法分别对煤柱宽度4 m、5 m、6 m、7 m和8 m五种情况进行深入研究。研究结果表明,当煤柱宽度为5 m时,垂直应力峰值水平较低且影响范围较小,巷道围岩稳定性较好,为相似矿井区段煤柱留设提供了理论基础。

Aimging at the large loss of coal pillar resources in the thick coal seam mining section of Fuda Coal Mine,taking the 15204 working face of the mine as the research background,five conditions of coal pillar width of 4 m,5 m,6 m,7 m and 8 m are studied deeply by methods of on-site borehole snooping,laboratory test,theoretical analysis and numerical simulation.The research results show that when the width of coal pillar is 5 m,the peak level of vertical stress is lower and the influence range is smaller,the stability of roadway surrounding rock is better,which provides a theoretical basis for the retention of coal pillars in similar mine sections.