摘要
为解决弱胶结软岩巷道支护困难的问题,以伊犁一矿弱胶结软岩巷道为研究对象,结合煤岩物理力学性质及原岩应力测试结果,在分析巷道围岩变形破坏原因的基础上,通过优化支护参数提出了锚网索耦合支护方案。在利用数值模拟验证新支护方案可靠性的基础上,通过现场观测分析总结了采用新支护方案后巷道围岩变形有巷道开挖影响、变形限制、稳定变形3个阶段。结果表明:顶底板移近量平均为50 mm,两帮移近量平均为23 mm,变形稳定时间缩短为15 d;锚网索耦合支护能有效控制巷道围岩变形,改善围岩应力状态,充分利用深部围岩的自承载力。
In order to solve the support difficult problem of weakly consolidated soft rock roadway, this paper took weakly consolidated soft rock roadway of Yili No. 1 Mine as a study object, combined physical-mechanical properties and primary rock stress test results, roof bol- ting with anchor and wire mesh coupling support scheme was introduced by optimizing support parameters on the basis of analyzing the ma- jor causes of deformation and failure of roadway surrounding rocks.On the premise of verifying the reliability of the new support scheme by using numerical simulation, the three stages of roadway surrounding rock deformation was summarized.According to field observation and a- nalysis after applied the new support scheme, which were the influence stage of roadway excavation, deformation limited stage and steady deformation stage.The results showed that roof-to-floor average convergence was 50 mm, rib-to-rib average convergerce was 23 mm, the time of deformation steady reduced to 15 days, roof bolting with anchor and wire mesh coupling support could control roadway surrounding rock deformation effectively, improve the state of surrounding rock stress and mobilize the bearing capacity of surrounding rock in depth ad- equately.
出处
《煤炭科学技术》
CAS
北大核心
2014年第1期23-26,共4页
Coal Science and Technology
基金
国家自然科学基金资助项目(51174128)
关键词
弱胶结软岩
锚网索支护
围岩稳定性
矿山压力
weakly consolidated soft rock
roof bolting with anchor and wire mesh support
surrounding rock stability
rock pressure
