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本文通过分析受断层影响的地表移动实测资料发现,不连续下沉盆地的台阶是多次滑动逐渐形成的,其地表位置在开采边界上方,呈正态分布。文中提出了台阶状下沉盆地的数学表达式及实用公式,为不连续地表移动预计提供了一个有效的方法。应用边界元法数值模拟,结果表明:断层面倾角、弱面的力学性质、厚岩应力场及断层露头的位置是岩体滑移的主要影响因素。文中计算了两个实例,计算值与实测值拟合较好。
In this paper, by analyzing the measured data of surface movement affected by faults, it is found that the discontinuity in the subsidence basin is formed by multiple slides and its surface position is above the mining boundary, which shows a normal distribution. The mathematical expressions and practical formulas of stepped subsidence basin are proposed in this paper, which provides an effective method for predicting discontinuous surface movement. The boundary element method is applied to numerical simulation. The results show that the main factors affecting the slip of rock mass are the fault dip angle, mechanical properties of weak face, thick rock stress field and the position of fault outcrop. Two examples are calculated in this paper. The calculated value and the measured value fit well.