【摘要】 在我国,近距离煤层赋存和开采所占比例很大,而吕梁矿区木瓜煤矿层间距小于10 m的可采储量占总储量的80%,所以研究近距离下煤层开采岩层破断微震监测技术具有重要的现实意义。针对木瓜煤矿近距离下煤层109工作面巷道支护、区段煤柱的合理宽度确定的技术难题,基于微震监测原理理论,采用现场监测的方法,对工作面回风巷的上覆岩层破断的时空位置、能量和微震事件分布形态特征等随工作面推进的变化进行监测,确定109工作面侧向矿山压力分布规律、上覆岩层的破断规律及破坏程度,为确定区段煤柱的合理宽度提供现场科学数据,实现近距离煤炭资源的安全高效回采。更多还原

【Abstract】 The closed distance coal seam mining has large proportion in China,and recoverable mining coal reserves,which less than 10 m layer distance in Mugua mine of Lvliang,amounting to total reserves of 80%.So the rock microseismic study of under closed distance coal seam mining technology is of the important practical significance.The closed distance lower coal mining in Mugua mine,the technical problems were tunnel supporting of 109 working face and the reasonable width of coal pillar.Based on the microseismic monitoring theory,the in-situ monitoring method is used in the return airway strata break of time and space position,energy and microseismic distribution form characteristics with working face impelling,the 109 working face of mine pressure distribution rule and lateral strata break law and damage degree were determined.It provides scientific data with determining the reasonable coal pillar width,the closed distance of the coal resources realized safety and efficiency mining.更多还原