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根据平朔井工二矿29209采区煤层赋存条件及工作面煤层顶底板条件,建立了工作面开采计算模型,利用数值模拟方法研究了工作面推进过程中顶煤的破碎特征及应力分布规律,得出工作面推进12m时压力峰值增幅最大,最高峰值约为原岩应力值的1.9倍。模拟结果对提高放煤效率、控制顶板具有重要意义。
According to the occurrence condition of coal seam in No.29209 mining area of Pingshuo Jingong No.2 mining area and the roof and floor conditions of coal seam in working face, the calculation model of working face mining was established. The crushing characteristics and stress distribution law of top coal in working face pushing process were studied by numerical simulation It is concluded that the peak pressure increase is the maximum when the working face advances 12m, and the peak value is about 1.9 times of the original rock stress value. The simulation results are of great significance to improve coal efficiency and roof control.