煤矿安全2019，Vol.50Issue(1)：157-160,4.DOI:10.13347/j.cnki.mkaq.2019.01.039
郭屯煤矿动压沿空巷道破坏机理及支护控制
Failure Mechanism and Support Control of Dynamic Pressure Along Goaf Roadway in Guotun Coal Mine
摘要
Abstract
In this paper, the asymmetric support scheme of prestressed yield pressure is proposed based on the problem of the stress distribution of surrounding rock and the uneven deformation of the roadway in 1103 transportation lane of Guotun Coal Mine.Through theoretical analysis, numerical simulation and engineering observation, the failure mechanism of surrounding rock in dynamic pressure roadway is analyzed. And the support parameters of the anchor net are studied. The best support scheme is obtained and applied to engineering practice.The results show that: pre-stressed yield bolt is close to the yield limit of bolt, which can bear the load quickly to ensure that the bolt system does not have plastic damage; the prestress of the designed high strength prestressed anchor is 60 kN; 5 roof bolts and 4 upper bolts are arranged; the position of the anchor cable is biased toward the side of the air. The design support scheme greatly improves the original support state and controls the stability of the surrounding rock of the roadway. The unsymmetrical stress distribution of roadway surrounding rock is controlled in the range of basic symmetry of deformation.关键词
数值模拟/非对称支护/预应力让压锚杆/控制变形/巷道支护Key words
numerical simulation/asymmetric support/prestressed yield bolt/control deformation/roadway support分类
矿业与冶金引用本文复制引用
李延辉,孙佳欣,王振伟,赵艳鹏..郭屯煤矿动压沿空巷道破坏机理及支护控制[J].煤矿安全,2019,50(1):157-160,4.基金项目
贵州省教育厅青年科技人才成长资助项目(黔教合KY字[2016]268号) （黔教合KY字[2016]268号）
贵州省科技厅技术基金资助项目(黔科合人才团队[2013]4030号) （黔科合人才团队[2013]4030号）
