山区地表移动预计修正模型及其参数求取方法

为了克服山区开采地表沉陷预计模型中的滑移影响函数以及求参模型的缺点,建立了山区开采地表移动变形预计修正模型,即新的滑移影响函数仍沿用原有参数A,P,t形式,但各参数的取值和物理意义存在差异。依据修正模型,以实测下沉值、水平移动值分别与模型预计值之差平方和最小为原则构建适应度函数,基于遗传算法原理进一步提出了山区地表沉陷预计模型求参新方法。最后将提出的山区沉陷预计修正模型和求参方法用于山西某矿工作面开采地表移动,取得了良好的工程实践效果。

New method of updating design for model and its parameter to prediction surface movement in mountainous mining

In order to overcome the shortcomings of the prediction functions in slip surface mountain mining subsidence，the correction model of surface movement and deformation prediction in mining was established，which still using the original form parameter A，P，t，but the value and physical meaning is different.According to the correction model，constructing fitness function under the residual sum of square is minimal between the measured subsidence value，horizontal movement value respectively and the expected value of model，the new method of the surface subsidence prediction model for the mountains is further proposed based on the principle of genetic algorithm .Finally put the method proposed in this paper used for the ground surface movement in Shanxi some mine working face，and that has obtained the good effect of engineering practice.