不规则工作面开采地表沉陷线积分预计方法

沉陷预计方法对于预判煤层开采诱发的负面影响十分重要。概率积分法是开采沉陷预计的重要方法，但对于不规则工作面开采，其预计精度有待提高。本文针对这一问题，利用格林公式(Green formula)对概率积分法公式进行积分转换，将对工作面的积分转换为对采区边界的线积分；将边界简化分割为多条直线段，分别对各直线段作积分计算；通过叠加计算完成地表任意点及地表沉陷盆地移动变形预计；最后基于某实例进行了应用研究，验证了本文方法的有效性，相比概率积分法，本文提出的线积分法预计精度提高了23 %。

Line integral method for predicting surface subsidence in irregular working face mining

The subsidence prediction method is very important for predicting the negative impact induced by coal mining.Probability integral method is an important method for mining subsidence prediction, but for irregular working face mining, its prediction accuracy needs to be improved.Aiming at this problem, the Green formula was used in this paper to transform the formula of the probability integration method, and convert the integration of the working face to the line integration of the boundary of the mining area; the boundary of working face was simplified and divided into multiple straight line segments, and each straight line segment was integrated separately; the prediction of the movement and deformation of any point on the surface and the surface subsidence basin was completed through superposition calculation; finally, an application study was carried out based on a certain example, which verified effectiveness of the method in this paper.Compared with the result of the probability integration method, the prediction accuracy of the line integral proposed in this paper was improved by 23 %.