新兴矿薄煤层解放层开采数值分析

Numerical Analysis of Emancipate Coal Seam Mining in Thin Coal Seam of Xinxing Mine

为有效防治冲击矿压灾害,利用FLAC3D数值模拟软件模拟了新兴矿开采上、下解放层对被解放层的卸压效果。结果表明:上解放层开采,63#煤的开采对65#煤起到一定的应力解放作用,但是不够充分;上解放层开采,65#煤的开采对于67#煤起到了解放作用,由于65#煤开采后的底板破坏深度最大为24 m,卸压深度最高达65 m左右,对67#煤的顶底板起到卸压作用;下解放层开采,67#煤的开采顶板破坏高度要大于底板破坏深度,其卸压高度约为70 m左右,对65#煤起到了很好的解放作用。

In order to effectively control rock burst hazard,discusses simulation and analysis of upper and under emancipate coal seam caving of Xinxing Mine by FLAC3Dand study on the discharging pressure efficiency. The results show 63 coal seam mining has a little emancipate function on upper emancipate coal seam mining to 65 coal seam, 65 coal seam mining has emancipate function in upper emancipate coal seam mining to 67 coal seam and top damage height is much more bottom break height in 67 coal seam mining, it is about 70 m and has great emancipate function.