承压含水层下综放开采覆岩破坏特征模拟
Simulation of Overlying Rock Failure Characteristics in Fully Mechanized Top Coal Caving Mining under Confined Aquifer

在分析朱仙庄矿水文地质条件的基础上，采用经验公式、数值分析、相似模拟等方法，分析了8106工作面覆岩顶板的“三带”发育过程，考虑采动应力与渗流的耦合作用，研究了随工作面的推进上部含水层的渗流演变规律。结果表明：随工作面不断推进，8106回采工作面采空区裂隙发育高度约为110 m，与经验公式法的计算结果基本一致；通过数值模拟和相似模拟实验分析得到含水层受采动影响发生渗流现象，孔隙水未进入到回采工作面采空区。为保证8106工作面的正常回采，提出数值分析、理论计算与相似模拟三者结合互相验证的方法，综合分析判断裂隙发育特征，其结果基本一致，研究过程对类似工程条件下的煤层安全生产开采具有一定的借鉴意义。
On the basis of analyzing the hydrogeological conditions of Zhuxianzhuang Mine, empirical for-mulas, numerical analysis, similarity simulation and other methods were used to analyze the de-velopment process of the “three zones” of the overlying rock roof in 8106 working face. The coupling effect of mining stress and seepage was considered, and the seepage evolution law of the upper aquifer as the working face advanced was studied, thereby predicting the risk of water inrush from the roof. The results show that with the continuous advancement of the working face, the height of crack development in the goaf of the 8106 mining face is 110 m, which is basically consistent with the calculation results of the empirical formula method; Through numerical simulation and similar simulation experiments, it was found that the aquifer undergoes seepage under the influence of mining, and the pore water did not enter the goaf of the mining face. In order to ensure the normal mining of 8106 working face, this article proposes the fracture development characteristics obtained from numerical analysis, theoretical calculation, and similar simulation. The results are basically consistent, and the three methods are mutually verified and supplemented. The research results have certain reference significance for coal seam mining under similar engineering conditions.