浅埋中硬顶板下大采高区段煤柱合理宽度及支护技术研究

Research on the reasonable section coal pillars width and support technology with medium hard roof and shallow-seam mining

通过采用理论分析及数值模拟试验的方法,对比不同留设煤柱条件下的巷道支护效果,分析得出三交河煤矿2-506大采高工作面回采后煤柱及采空区侧支撑压力的分布规律,从而确定最佳的煤柱留设尺寸。同时,采用高预应力锚杆支护的技术,被支护巷道能够保持了整体完整性且支护结构体现了良好的主动承载能力。

By using the methods of theoretical analysis and numerical simulation, compared the roadway supporting effect when the design coal pillar width are different, analyzed the abutment pressure distribution law in coal pillar and gob side after mined in Sanjiaohe coal mine 2-506 large mining height working face, so as to determine the optimum coal pillar size. At the same time, using the technology of high pre-stress bolt supporting can maintain the roadway integrity, the support structure reflected the good and active bearing capacity. The control effect is remarkable, which greatly improves the recovery rate of coal, and improves the production efficiency of coal mine.