常村煤矿厚煤层分层开采减冲优化设计

Research of Thick Seam Slicing and Reduction Impact Optimization Design in Changcun Mine

针对常村煤矿21132工作面下巷在掘进过程中频繁发生冲击矿压问题,分析了21132工作面下巷冲击矿压产生原因,即Z型煤柱高应力的叠加,致使冲击地压频发;采用FLAC3D数值模拟软件,分析Z型煤柱区域的应力叠加程度及应力分布。同时针对21采区进行了巷道布置的优化分析,从如何避免应力集中、最大限度回采出煤炭资源等方面考虑,提出了3个工作面巷道系统减冲布置方案并分析优缺点,最终确定方案二为最优方案,为下分层工作面安全回采提供了坚实的基础。

According to the problem of frequent rock burst in driving process of lower roadway of 2113 2 work face in Changcun mine,the factors for rockburst is analyzed,that is,the superposition of the high stress of Z Coal pillar results in frequently rock burst. The numerical simulation software FLAC^3D is adopted to analyze the stress superposition level and the stress distribution in Z-type coal pillar zone. At the same time,the optimization analysis on the roadway arrangement for the No. 21 mining area is made. The proposals for the buffer arrangement of roadway system for three working faces are put forwards,by considering the aspects from how to avoid stress concentration and the maximum recovery of coal resources. And their advantages and disadvantages are analyzed to finally determine that the second one is optimal. This research provides a solid basis for the safe recovery of the bottom slicing workface.