煤层群分组上行开采相似材料模拟和数值模拟

通过理论分析计算，得出上下2组煤开采后的导水裂隙带发育高度以及理论破坏形态预计。通过计算机数值模拟、实验室相似材料模拟，研究分析了上下2组煤开采后覆岩破坏规律及顶底板应力分布规律、覆岩沉降规律，得出导水裂隙带最大值。数值模拟下煤层开采后的覆岩破坏高度，得到模拟的导水裂隙带高度，并与理论值、模拟计算结果对比，综合分析了分组上行开采覆岩破坏与运动规律。

Similar Material Simulation and Numerical Simulation of Coal Seam Group Ascending Mining

Through the theoretical analysis, developing height of water flowing fractured zone after up and down two groups of coal mining and theoretical failure form estimation were obtained. Combined computer numerical simulation and similar material simulation at laboratory, overlying strata damage law, roof and floor stress distribution law and overlying strata settlement law after up and down two groups of coal mining were studied, and the maximum value of water flowing fractured zone was obtained. Overlying strata damage height after down coal seam mining was simulated, and the simulative height of water flowing fractured zone was obtained. These simulated results were compared with the corresponding theoretical value. Damage and movement law of overlying strata after group ascending mining was analyzed synthetically.