深井强冲击煤层解放层开采防治冲击地压研究

Research on Mine Rock Burst from Liberated Seam Mining with High Burst Tendency in Deep Mine

某矿4煤采掘时多次发生冲击地压针对该矿实际地质条件,采用数值模拟方法分析上、下解放层开采对4煤被解放层的解放效果及1410工作面上平巷发生冲击地压原因。研究6煤和1煤解放层不同开采时期的应力分布特征,确定4煤被解放层上下部临界卸压角和临界卸压点位置及被解放层回采工作面超前临界卸压范围,为后续4煤工作面开拓开采巷道布置参数优化提供依据。

The rock burst has occurred many times in one mine when mining the 4th coal, according to the actual geological conditions of the mine, take the numerical simulation methods into analysis the liberation effect of the upper and lower layers of coal mining on 4th coal and the reason of rock burst occurring in the roadway of 1410. Study on the characteristics of stress distribution of 6th and 1th coal which is liberated in different production stages and identify the top and bottom layer of the critical pressure relief angle and the critical pressure relief point location of the 4th liberated coal, Provide the basis on the parameter optimization of roadway layout to avoid rock burst in the subsequent face mining of 4th coal.