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针对房柱采空区下特厚煤层开采覆岩垮落运移引起冒顶压架的灾害问题,以斜沟煤矿13号煤层大采高放顶煤工作面为工程背景,运用相似模拟试验,对房柱式采空区下特厚煤层开采覆岩垮落特征进行分析。研究结果表明:底煤开采过程中有着明显的顶煤初次垮落,直接顶初次垮落,基本稳定在0.23 m(23 m)左右;进出煤柱时,压力较大,围岩破碎严重,且可能与老采区裂隙带贯通造成突水、瓦斯突出等事故。研究结果可为了类似条件下覆岩垮落规律提供依据和参考。
Aiming at the disaster of roof caving ram caused by caving of overlying strata in the mining of thick coal seam under gob area, aiming at the background of big caving coal caving face in No. 13 seam of Xiegou coal mine, using similar simulation test, Analysis of Caving Characteristic of Overburden Strata in Mining Extra - thick Seam under Room - pillar Gob Area. The results show that there is a clear top coal caving during the first coal mining process, and the direct top capes for the first time, which basically stabilizes at about 0.23 m (23 m). When entering the coal pillars, the pressure is high and the surrounding rock is severely damaged It may be caused by water inrush and gas outburst along with the fracture zone of the old mining area. The results can provide the basis and reference for the overlying rock caving law under similar conditions.