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根据冲击地压发生地点的分布特征,结合朱集矿11-2#煤层的赋存条件,对2种不同瓦斯压力条件下的冲击地压发生过程进行数值分析,研究了冲击发生过程中的煤体移动机理,并得出了煤体破裂演化图、瓦斯流动状况图及应力分布曲线图。研究结果显示:不同瓦斯压力条件下的煤体破裂失效过程基本相同;在高瓦斯压力条件下,软煤初始破裂相对比较剧烈,瓦斯流量比较高,煤壁破坏深度更大,冲击地压灾害比较严重;煤层与顶板之间的滑移可以考虑为滚动摩擦。
According to the distribution characteristics of the place of rockburst and the occurrence conditions of 11-2 # coal seam in Zhuji Mine, the occurrence of rock burst under two different gas pressure conditions is analyzed numerically. The influence of coal Body moving mechanism, and obtained the evolution diagram of coal body rupture, gas flow diagram and stress distribution curve. The results show that the failure process of coal body under different gas pressure conditions is basically the same. Under the condition of high gas pressure, the initial rupture of soft coal is relatively intense, the gas flow rate is relatively high, the depth of coal wall is more serious, Serious; slip between the coal seam and the roof can be considered as rolling friction.