Shaanxi Binchang Mengcun Mining Industry Co., Ltd.

为了揭示黄土层深部开采条件覆岩和地表移动规律,基于孟村矿401101工作面开采地质条件,采用地表实测和数值模拟相结合的方法,分析了煤层开采过程中地表移动盆地的分布和变化特征,计算确定了下沉、倾斜、曲率、水平移动和水平变形最大值;揭示了厚黄土层深部开采地表沉降量小、移动变形集中、地表移动前期具有突发性沉陷特点,确定了地表活跃阶段下沉量占沉陷总量的66.8%;确定了该矿地表移动角量参数和概率积分预计参数;研究了采动覆岩的位移和应力变化规律。研究成果可为该采区后续工作面和类似采矿条件矿井的开采规划设计和采动损害控制提供有益参考。

In order to reveal the overburden rock and earth surface movement laws of deep mining conditions in loess layers, based on the mining geological conditions of the 401101 working face of Mengcun Mine, a combination method of earth surface measurement and numerical simulation is used to analyze the distribution and variation characteristics of earth surface movement basins in the process of coal seam mining. The maximum values of subsidence, inclination, curvature, horizontal movement, and horizontal deformation are calculated and determined; it is revealed that deep mining of thick loess layers has characteristics of small earth surface subsidence amount, concentrated movement deformation, and sudden subsidence in the early stage of earth surface movement. It is determined that the subsidence amount during the active stage of the earth surface accounted for 66.8% of the total amount of subsidence; the earth surface movement angle parameters and probability integral prediction parameters of the mine are determined; the displacement and stress variation laws of overburden rock during mining are studied. The research results can provide useful references for the mining planning and design of this mining area subsequent working faces and mines with similar mining conditions, as well as the control of mining damage.