论文部分内容阅读
针对漳村煤矿2502工作面X_(12)陷落柱情况,本文运用FLAC~(3D)数值软件模拟对工作面推进过程中陷落柱变形及煤层中应力变化情况进行了研究,研究结果表明:随着开采的进行,逐渐出现了较明显的应力集中现象.在过陷落柱期间,工作面顶板的破坏范围大约在54 m,而底板的破坏范围大约在22 m.开采到距陷落柱35 m时,采动作用对陷落柱开始作用.对过X_(12)陷落柱进行可行性分析得出,采用采煤机截割与放炮破碎相结合的方式强行通过.工程实践表明,该方案保证了工作面的连续推进,不仅有效地控制了陷落柱对生产的影响,提高了煤炭资源的回收率,而且能为以后的工作面过陷落柱提供技术指导.
Aiming at the situation of X_ (12) collapse column in 2502 working face of Zhangcun coal mine, this paper studied the deformation of the collapse column and the stress change in the coal seam by using FLAC 3D numerical simulation software. The results show that with the During the mining process, obvious stress concentration gradually appeared.During collapse of the column, the failure range of the working face roof was about 54 m, while that of the bottom plate was about 22 m.After mining to 35 m from the collapse column, The mining effect begins to act on the collapse column.The feasibility analysis of the overlying X_ (12) collapse column shows that it is forced to pass through the combination of shearer cutting and blasting and crushing.It is proved by the engineering practice that the working face The continuous propulsion not only effectively controlled the impact of collapse column on production, but also improved the recovery rate of coal resources, and provided technical guidance for the collapse of collapsed column in the future.