摘要
为解决大断面回风巷围岩变形量大的问题,采用现场测试、数值模拟的方法开展了支护方案设计,并采用FLAC2D数值模拟对各支护方案的巷道进行受力分析。结果表明:随着支护强度增加,顶板和煤柱侧帮应力区向围岩深部转移,采空区的支承压力对顶板和侧帮影响降低,围岩变形量减小,对比分析各支护方案后,确定了合理的支护方案。井下实践表明,回风平巷围岩大变形得到有效控制。
In order to solve the problem of the deformation of surrounding rock in the large section roadway,the support scheme is designed by using the field test and numerical simulation method,the stress analysis of roadways by adopting supporting schemes is conducted by using FLAC2D numerical simu-lation method.The research results show that with the increasing of supporting strength,the stress zone of roof and coal pillars transfer to deep surrounding rock mass,the influence of abutment pressure of goaf to roof and lateral wall is decreased,the deformation of surrounding rock is decreased too.The characteris-tics of supporting schemes are analyzed,so,the reasonable supporting scheme is determined.The under-ground experience show that the large deformation of the surrounding rock mass of tailgate is controlled ef-fectively.
出处
《现代矿业》
CAS
2015年第7期127-129,共3页
Modern Mining
关键词
大断面巷道
锚杆锚索联合支护
数值模拟
Large section
Combination supporting with bolt and anchor
Numerical simulation
