College of Energy and Mining Engineering, Shandong University of Science and Technology
Shanxi Zhongyang Huarun Liansheng Sucun Coal Industry Co., Ltd.

针对苏村煤矿6煤、10煤分层同采错距不合理,上下两工作面开采受动压的相互影响,造成工作面冒顶、片帮、支架折损等问题,通过采用理论分析、数值模拟以及工程应用相结合的方法对邻近煤层同采工作面巷道布设位置及错距进行了优化研究。研究结果表明:考虑不同开采方式下10煤层巷道围岩应力变化特征,确定上下煤层巷道采用对齐式布置;考虑下煤层开采时覆岩移动,下煤层区段煤柱应大于16.7m;上下煤层同采时工作面合理错距在45m左右。研究结果应用工程实践表明,同采期间工作面支架受力平稳,实现了邻近煤层安全高效同采,对类似条件下的煤层群开采具有重要的指导意义。

In view of the unreasonable layered simultaneous mining staggered distances of the 6th coal and the 10th coal in Sucun Coal Mine, as well as the upper and lower working faces mining affected by mutual influence of dynamic pressure, resulting in problems of roof caving, wall fragmentation, and support damage in the working face and so on, a combination method of theoretical analysis, numerical simulation, and engineering application is used to optimize and study the layout location and staggered distance of adjacent coal seam simultaneous mining working face roadways. The research results indicate that considering the stress variation characteristics of the surrounding rock of the 10th coal seam roadway under different mining ways, it is determined to adopt an aligned type layout for the upper and lower coal seam roadways; considering the movement of overlying rock during the lower coal seam mining, the coal pillar in the lower coal seam section should be greater than 16.7 m; the reasonable staggered distance of the working face during simultaneous mining of the upper and lower coal seams is around 45 m. The application of research results in engineering practice shows that the force of the working face support is stable during the simultaneous mining period, achieving safe and efficient simultaneous mining of adjacent coal seams. This has important guiding significance for the mining of coal seam groups under similar conditions.