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本文结合江西钟家山煤矿观测石门内大量岩移内部观测资料,对重复采动条件下采场上覆岩层垂直移动变形规律进行了分析研究,从而再次证明了重采时上覆岩层呈整体下沉,最大下沉速度滞后距较小的这一特点;提出了随工作面位置的推进采场上覆岩层不但产生垂直拉伸变形而且部分岩层产生压缩变形的特点,揭示了不同位置的覆岩导水裂隙带的发育规律,得出在充分采动区当工作面推过15～20米,在采区边界工作面推过35米导水裂隙带发育最高以及采区边界导水裂隙带高于充分采动区且压实速度较慢的结论,为及时施工冒落孔探测导水裂隙带高度提供了科学依据;最后对采场上覆岩层垂直移动变形
Based on the observation data of a large number of rock movements in the Shihmen, Jiangxi Zhongzhushan coal mine, the vertical movement and deformation of the overlying strata under the condition of repeated mining are analyzed and studied. , And the maximum subsidence speed is small. Based on the characteristics of the working face position, the overburden stratum not only produces vertical tensile deformation but also compresses and deforms some of the rock strata, and reveals that the overburden guide The result shows that when the working face pushes through 15-20 meters in the fully-mechanized mining area and 35 meters in the working face of the mining area, the water-conducting fracture zone develops the highest and the water-carrying fracture zone in the mining area is higher than Fully mining zone and the compaction speed is slow, which provides a scientific basis for the timely detection of the height of the aqueduct with the detection of water-carrying fracture zone. Finally, the vertical deformation of overlying strata