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为了分析固体充填开采不同充填因素对地表沉陷的影响规律,以某煤矿地质采矿条件为基本背景,采用FLAC3D数值模拟,对固体充填开采不同充填条件下地表沉陷规律进行了模拟研究。研究结果表明:当充填率增加,地表移动迅速降低,其移动极值近似于线性关系减小;随着充填体刚度的增大,地表移动变形逐渐降低,其降低的幅度随充填材料刚度的增大而逐步趋于平缓;地表移动极值对充填体弹性模量的敏感度随充填率的增加而增大;固体充填开采中充实率与地表移动极值之间满足线性变化规律。
In order to analyze the influence of different filling factors on surface subsidence in solid filling, the ground subsidence law under different filling conditions of solid filling was simulated by using FLAC3D numerical simulation based on geological conditions of a coal mine. The results show that when the filling rate increases, the surface movement decreases rapidly and the moving extremum approximates a linear decrease. With the increase of the filling stiffness, the surface deformation decreases gradually, and the decreasing amplitude increases with the increase of filling material stiffness The sensitivity of the extreme value of surface movement to the elastic modulus of the filling increases with the increase of the filling rate. The linear variation between the filling rate of solid filling and the extreme value of the surface movement satisfies the law.