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以龙固矿巨厚松散层下深部开采为研究背景,分析了煤矿深部开采地表沉陷机理,建立下部离散介质-中部弹性薄板-上部松散层随机介质的耦合模型,对地表沉陷规律进行研究。通过分析各层位岩层的移动特征,推导出其弯曲下沉方程,分别求出各分层的下沉值,再通过线性叠加,得出厚松散层下深部开采的地表下沉值。分别把运用该方法得出的预计结果和运用整体模型进行地表沉陷预计的结果与实测结果进行比较,发现此模型对厚松散层下深部开采地表沉陷的预计结果更为准确。
Taking the deep mining under the huge solid loose layer of Longgu solid mineral as background, the mechanism of surface subsidence in deep mining of coal mines was analyzed, and a coupling model of random medium in the middle of the middle elastic plate - upper loose layer was established to study the law of surface subsidence. By analyzing the movement characteristics of rock layers in different layers, the bending subsidence equation is deduced, and the subsidence values of each layer are calculated respectively. Then, the surface subsidence value of deep mining under thick soil layer is obtained by linear superposition. The predicted results obtained by using this method and the predicted results of surface subsidence using the integrated model are compared with the measured results respectively. The results show that the model is more accurate for the prediction of the surface subsidence under the deep loose layer.