Underground excavation leads to surface subsidence. Once the surface deformation value exceeds a certain limit, the railway in surface subsidence area will be seriously damaged.
地下开挖工程导致地表沉陷，一旦地表变形值超过一定界限时，地表沉陷区内的铁路就会受到严重破坏。
And combine control mining method, surface subsidence preplan theory, mining landslide area disaster forecast and numerical simulation studied out controlling mining estimate measure.
并结合控制开采方法、煤柱稳定性分析、地表沉陷预计、采动滑坡区灾害预测理论以及数值模拟确定了控制开采的评价方法。
The surface subsidence above coalmine gob area is a typical and serious geological environment problem in Yongcheng mining area.
煤矿采空区地面沉陷是永城矿区典型、突出的矿山地质环境问题。
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