煤层分岔区变厚度夹矸下巷道支护技术研究  

Research on the Support Technology of Roadway with Variable Thickness Gangue in Bifurcated Area of Coal Seam

作　　者：侯本猛 HOU Benmeng(Zhaolou Coal Mine,Yanmei Heze Energy Chemical Co.,Ltd.)

机构地区：[1]兖煤菏泽能化有限公司赵楼煤矿,山东省菏泽市274700

出　　处：《现代矿业》2024年第11期98-101,122,共5页Modern Mining

摘　　要：针对赵楼煤矿7302工作面巷道分岔区变厚度夹矸以及因上层回采导致顶板稳定性区别较大的问题,采用滑移场理论进行计算,并辅以钻孔窥探顶板塑性破坏深度,利用ANSYS软件模拟支护优化前后巷道顶板的塑性破坏,应力、应变分布,研究优化后支护方案的安全性。研究结果表明:上层巷道回采导致顶板塑性破坏深度为4.71 m;当巷道顶板厚度大于5 m时,夹矸内部裂隙较少;采用原支护方案对7302工作面进行回采时,运输顺巷和轨道顺巷顶板都出现了贯穿型塑性破坏;根据各厚度夹矸顶板的破坏情况,将巷道顶板划分为1~3 m、3~5 m和5 m以上3种类型,并采用相应的支护方案,最终顶板最大沉降量为15.2 mm,可安全进行回采。In order to solve the problems of variable thickness gangue in the bifurcated area of roadway 7302 working face in Zhaolou Coal Mine and the large difference in roof stability caused by upper stoping,the sliding field theory is used for calculation,and the plastic failure depth of roof is detected by drilling.ANSYS software is used to simulate and optimize the plastic failure,stress and strain distribution of roof before and after roadway.The safety of the optimized support scheme is studied.The results show that the plastic failure depth of roof caused by mining in upper roadway is 4.71 m.When the thickness of roadway roof is greater than 5 m,there are fewer cracks in the inside of gangue.When the original support scheme is adopted in stoping the 7302 face,plastic failure occurs in the roof of both transportation and track heading.According to the damage condition of the roof of each thickness of gangue,the roof of the roadway is divided into three types:1~3 m,3~5 m and above 5 m,and the corresponding supporting scheme is proposed.The maximum settlement of the final roof is 15.2 mm,which can be safely mined.

关 键 词：煤层分岔区 变厚度夹矸 支护优化 数值模拟 顶板位移监测 

分 类 号：TD353[矿业工程—矿井建设]