摘要
贵州发耳煤矿+980 m轨道大巷受群煤层重复采动影响,巷道围岩长期处于高应力状态,导致巷道出现片帮、顶板下沉及围岩破碎等问题。依据钻孔窥视结果分析,确定大巷塑性区范围后,提出不同的支护方案,采用Phase软件对不同支护方案下的围岩塑性区范围和位移进行对比,最后确定采用长3.5 m锚杆和8.5 m锚索以及注浆联合支护加固方案。监测表明,40 d内巷道顶底板移近量及两帮位移变化量均小于0.2 m,且变形逐渐趋于稳定。优化后的联合支护方案能有效控制现场巷道变形,为同类型巷道支护工程开展提供借鉴。
Due to the repeated mining of the group coal seam,the surrounding rock of the+980 m track roadway in the faer coal mine of Guizhou Province has been in a high stress state for a long time,which leads to the problems of spalling,roof sinking and surrounding rock breaking.According to the analysis of drilling peep results,after determining the plastic area of the main roadway,different supporting schemes were proposed.Phase software is used to compare the plastic area and displacement of surrounding rock under different supporting schemes.Finally,the 3.5 m long anchor bolt and 8.5 m long anchor cable and grouting combined supporting and reinforcement scheme were determined.The monitoring results showed that the displacement of roof and floor and the displacement of both sides are less than 0.2 m within 40 days,and the deformation tends to be stable gradually.The optimized combined supporting scheme can effectively control the deformation of the roadway on site and provide reference for the supporting engineering of the same type of roadway.
作者
孙守义
都书禹
赵长政
李江
王星瑶
宋宇珠
SUN Shou-yi;DU Shu-yu;ZHAO Chang-zheng;LI Jiang;WANG Xing-yao;SONG Yu-zhu(Guizhou Faer Coal Industry Co.,Ltd.,Liupanshui,Guizhou,553017;State Key Laboratory Coal Resources and Safe Mining,China University of Mining&Technology,Xuzhou,Jiangsu,221116)
出处
《煤炭科技》
2019年第6期1-4,13,共5页
Coal Science & Technology Magazine
基金
国家自然科学基金项目(51874284):西部矿区短壁块段式采煤覆岩应力-裂隙-渗流耦合机理与保水技术
关键词
塑性区
数值模拟
联合支护
位移监测
plastic zone
numerical simulation
combined supporting
displacement monitoring
