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目前实际采用的地表移动计算方法大都是以下面两个原理为基础的: 1、迭加原理:大面积开采对地表的影响,等于单元开采对地表的影响之和。 2、独立传播原理:开采引起的地表移动在走向和倾向两个竖直平面内的传播相互独立。前者为计算任意开采影响下的地表移动提供了方便,后者为使用平面问题解算空间问题提供了有效的途径。平面问题时,地表点的下沉W(x)利用迭加原理可表示如下
At present, most of the actual ground moving calculation methods are based on the following two principles: 1. The principle of superposition: the effect of large-scale mining on the surface is equal to the sum of the influence of unit mining on the surface. 2, the principle of independent dissemination: mining caused by the movement of the surface in the vertical and horizontal orientation of the two independent propagation. The former facilitates the calculation of surface movement under the influence of any mining, and the latter provides an effective way to solve the problem of space using plane problems. Plane problems, the surface point sink W (x) can be expressed using the principle of superposition as follows