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以祁南矿32煤层34采区34下2工作面为原型,采用UDEC3.10数值模拟软件,对煤矿开采工作面后方几十米范围内的上覆岩层裂隙发育情况进行了分析,通过模拟工作面100 m×150 m×3 m(走向长×倾向宽×采高)在2 m/d和5m/d开采速度条件下的覆岩裂隙发育规律,比较工作面不同开采速度条件下,工作面后方50 m处覆岩裂隙发育变化情况,优化设计了高位钻孔抽采的终孔高度、压茬距离和倾向控制范围等参数,该参数可为其他矿区高位钻孔抽采方案的确定提供参考。
Based on 34 sub - 2 working face of 34 coal mining area in 32 coal seam of Qinan Mine, UDEC3.10 numerical simulation software was used to analyze the development of overlying rock crack development within a few tens of meters behind coal mining face. Through the simulation work Surface mulching cracks in the area of 100 m × 150 m × 3 m (length, width and width × mining height) under 2 m / d and 5 m / d of mining speed, the working face The development and changes of the overburden fractures at 50 m behind are optimized, and the parameters such as the final hole height, the stubble distance and the control range of dip height are optimized, which can provide references for the determination of high-level drilling and drainage schemes in other mining areas .