深部回采工作面过断层期间矿压显现规律分析

Analysis of mine pressure behavior law during deep mining face crossing fault

为了进一步掌握深部冲击地压矿井工作面过断层期间超前压力影响范围,保证工作面顶板安全,采用数值模拟和理论分析相结合的方法研究鲁西南某冲击地压矿井回采过断层的影响,并建立了相对应的模型。结果表明:断层对煤层最大主应力分布影响较大,轨道顺槽巷帮最大主应力随与切眼距离增大而减小,而胶带顺槽巷帮最大主应力随与切眼距离增大,与断层距离减小而减小;随与切眼距离增大,与断层距离增大而增大。回采期间,其超前影响距离为85~95m区间,在回采期间应对轨道顺槽超前范围加强监测。

In order to further grasp the range of advance pressure impact during the mining of deep-seated rock burst-prone coal seams across faults and ensure the safety of the roof in the mining face,a combination of numerical simulation and theoretical analysis was used to study the impact of fault crossing on mining in a rock burst-prone coal mine in southwest Shandong Province,and a corresponding model was established.The results show that the fault has asignificant influence on the distribution of the maximum principal stress in the coal seam.The maximum principal stress in the track parallel to the fault decreases with the increase of the distance from the open-off cut,while the maximum principal stress in the tape parallel to the fault decreases with the increase of distance from the cutting eye and the decrease of distance to the fault.With the increase of distance from the open-off cut and the decrease of the distance from the fault,the maximum principal stress increases.During the mining period,the range of advanced influence is within the85-95m,and the monitoring of the advance range of the track trough should be strengthened during the mining period.