基于地表沉陷实测数据的覆岩内部移动变形预计方法

覆岩内部移动变形实测数据少、预计难度大、可靠性低。基于几何相似特征构建了依据地表沉陷实测数据预计覆岩内部移动变形的方法,该方法考虑了煤矿开采后覆岩移动变形导致的膨胀压缩。研究表明:预计离地表较近覆岩内部的移动变形时,可以不考虑覆岩的膨胀压缩,而预计离开采煤层较近覆岩内部的移动变形时,需要考虑覆岩的膨胀压缩;在开采边界附近,预计覆岩内部的移动变形可以不考虑膨胀压缩,而在开采中心附近则需要考虑膨胀压缩。研究结果有助于煤矿绿色安全开采。

Prediction Method of Internal Movement and Deformation of Overburden Based on Measured Data of Surface Subsidence

The measured data of internal movement and deformation of the overburden is insufficient, the prediction is difficult and the reliability is low. A method for predicting the internal movement and deformation of the overburden based on the measured data of surface subsidence was constructed based on the geometric similarity characteristics. This method considers the expansion and compression caused by the overburden movement and deformation after coal mining. The research show that the expansion and compression can be disregarded when predicting the movement and deformation of the overburden near the surface, while the expansion and compression need to be considered when predicting the movement and deformation of the overburden far from the surface; Near the mining boundary, it is expected that the internal movement and deformation inside the overburden may not consider the expansion and compression, while the expansive compression needs to be considered near the mining center. The research results are helpful to the green and safe mining of coal mines.