以祁东煤矿7131工作面为例,采用FLAC3D模拟了厚松散层覆盖下的煤层开采底板破坏特征,并与经验公式计算结果进行对比分析。结果显示:厚松散层覆盖下的煤层底板岩层由于受到上覆高自重应力的影响,破坏深度和形式与基岩覆盖下煤层开采存在一定的差异。 Taking the 7131 face of Qidong Coal Mine as an example, the failure characteristics of coal floor mining floor under the condition of thick and loose layers are simulated by FLAC3D, and the results are compared with the empirical formula. The results show that due to the overburden and high self-weight stress, the coal seam floor rock strata under the cover of thick loose layer have some influence on the coal seam mining under the cover of bedrock.