在“三下”采煤设计中,计算地表最大水平移动和最大水平变形及其位置是一项重要的内容。开采倾斜煤层时目前概率积分法在这方面所采用的计算公式都是近似的,常给实际工作带来一些困难。为了完善这一计算方法,本文探讨了这一问题。一、现有文献关于地表倾斜剖面最大水平移动值及其出现位置的计算公式 1、近似公式[1] 上山一侧(1) 下山一侧 (2) (1)式和(2)式是以X轴正向指向下山方向,上山方向的水平移动值为正,下 In “three times” coal mining design, calculating the maximum horizontal movement of the ground and the maximum horizontal deformation and its position is an important content. When mining inclined coal seam, the current calculation method of probability integral method adopted in this aspect is approximate, which often brings some difficulties to practical work. In order to improve this method of calculation, this article explores this issue. First, the existing literature on the maximum slope of the earth’s surface horizontal displacement and its location of the formula 1, the approximate formula [1] uphill side (1) Down side (2) (1) and (2) The positive X-axis points down the direction of the mountain, the direction of horizontal movement is positive, under