沿空留巷围岩给定变形及巷旁支护时机研究  

Research on the given deformation of surrounding rock and timing of roadway-side support in gob-side entry retaining

作　　者：赵健[1] 张鹏[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《煤炭工程》2017年第2期68-71,共4页Coal Engineering

基　　金：教育部高校博士学科专项科研基金项目(20120023110023)

摘　　要：为解决巷旁支护最佳时机的问题,对沿空留巷围岩结构进行分析,可知留巷基本顶的三铰接梁结构是沿空留巷围岩变形的关键因素,结合沿空留巷围岩给定变形对巷旁支护时机进行研究,提出巷旁支护应适应巷道围岩的给定变形,特别是顶板的给定变形运动。通过监测顶板下沉量判断三铰接梁结构的稳定情况,进而确定巷旁支护时机。采用数值模拟的方法,对神火集团薛湖煤矿沿空留巷过程中巷旁支护时机的合理性进行验证,结果表明:当巷旁支护滞后工作面煤壁10m时,支护效果良好,而巷旁支护最佳时机是滞后工作面煤壁25m,该结果可为该矿巷旁支护的现场施工提供技术支持。In order to determine the best timing of roadway-side support, the structure of surrounding rock in gob-side entry retaining was analyzed, which indicated the three hinged girder structure of the basic roof of retained roadway was the key factors for the surrounding rock deformation in gob-s/de entry retaining, and combined with the given deformation of surrounding rock in gob-side entry retaining to study the timing of roadway-side support. It was proposed that roadway- side support should adapt to the given deformation of surrounding rock of roadway, especially the given deformation of roof movement. The structure stability of three-hinged-girder was judged through roof settlement monitoring, and then the timing of roadway-side support was determined. The numerical simulation method was applied to assess the rationality of roadway-side support time in the process of gob-side entry retaining in Xuehu Coal Mine, the result showed that when the roadway-side support lagged lOre after working face, the support effect was good, and the best timing of roadway-side support was that the roadway-side support lagged 25m after working face.

关 键 词：沿空留巷 给定变形 巷旁支护 支护时机 数值模拟 

分 类 号：TD322[矿业工程—矿井建设]