Abstract Many dynamic disasters such as coal wall caving and roof falling have happened during longwall face crossing fault. Combined with the coal seam geological conditions in the 1302 longwall face AB coal mine, the paper comprehensively studies the overlying strata movement and the stress evolution laws of stope during superhigh-water material (SHWM) backfilling longwall face across fault by UDEC numerical simulation, theoretical analysis and on-site measurement. The results show that the stress during stable state is affected by the fault will increases abnormally. While the longwall face pass through the fault, the stress will abated and the vertical displacement of the overlying strata of two sides of the fault is significantly different. The fault significant blocks the propagation of stress and development of plastic zone. The superhigh-water material filling mining management roof has good protection effect on the roof when the longwall face encounters fault, which can effectively weaken the blocks effect of fault on stress propagation and plastic zone development. The numerical simulation results are consistent with the field experiments, and the research result provides theoretical basis and technical guidance for safe and efficient production during superhigh-water material backfilling longwall face through the fault.

中文翻译：

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深部回填长壁工作面断层构造触发上覆地层运动及应力演化规律

摘要 长壁工作面穿越断层发生了煤壁崩落、顶板倒塌等动力灾害。结合AB煤矿1302长壁工作面煤层地质条件，通过UDEC数值模拟、理论分析，综合研究了超高水材料(SHWM)回填长壁工作面穿越断层时上覆地层运动及采场应力演化规律。分析和现场测量。结果表明，稳态时的应力受故障影响会异常增加。当长壁工作面穿过断层时，应力会减弱，断层两侧上覆地层的垂向位移有显着差异。断层显着阻碍了应力的传播和塑性区的发展。超高水材料充填开采管理顶板在长壁工作面遇到断层时对顶板具有良好的保护作用，可有效减弱断层对应力传播和塑性带发育的块体效应。数值模拟结果与现场试验结果一致，研究结果为超高水材料穿越断层回填长壁工作面的安全高效生产提供了理论依据和技术指导。