迎采窄煤柱巷道围岩控制技术研究  

Ground Control of Roadway with Narrow Pillar During Retreating of Adjacent Longwall Panel

作　　者：李文峰[1] 张科学[2] 

机构地区：[1]中国矿业大学矿业工程学院,江苏徐州221008 [2]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《煤炭技术》2014年第7期112-115,共4页Coal Technology

基　　金：国家自然科学基金项目(51174195);全国博士学位论文作者专项资金资助项目(200760);煤炭资源与安全开采国家重点实验室自主研究课题资助(SKLCRSM08X04)

摘　　要：通过数值分析,研究了迎采窄煤柱宽度内应力场和位移场的分布规律,探讨了邻近工作面回采对巷道围岩稳定性、围岩变形的影响,并最终确定了合理的窄煤柱宽度,同时研究得到了高强锚杆锚索加固巷道围岩,重点加固窄煤柱帮的围岩控制技术。现场应用表明,合理留设迎采窄煤柱并采用高强锚杆锚索联合支护迎采窄煤柱巷道,经历两次采动影响后,巷道围岩顶底板和两帮变形量均<300 mm,有效控制了围岩的大变形,技术经济效果显著。Through numerical analysis to study the stress and displacement in pillars of different widths between the adjacent panels in the paper . As was expected, the deformation of the roadway occurred during the retreat of the adjacent panel was discussed to facilitate the proposition of a quality pillar. Meanwhile, the bolts and cable bolts were proposed to reinforce the surrounding rocks. Note the narrow pillar gained more attention during the installation of the bolts. The case study indicated that the proposed width for narrow pillar and installation pattern of bolts and cable bolts can significantly reduce the roadway deformation occurred during the retreating of the previous and current panels. Both the roof-to-floor and rib-to-rib convergences after the retreat of the current panel were less than 300mm. Hence, it can be concluded that the findings in this work can be used to address the ground control problems in longwall panels with the similar geological and mining conditions.

关 键 词：单翼上行开采 迎采窄煤柱巷道 二次采动影响 围岩控制技术 

分 类 号：TD353[矿业工程—矿井建设]