巷道开挖围岩及支护结构稳定性的数值模拟研究  

Numerical simulation on stability of surrounding rock and support structure for tunnel excavation

作　　者：郭兵兵[1,2] 孙光中[1] 刘长武[2] 刘德峰[2] 

机构地区：[1]河南工程学院安全工程学院,河南郑州451191 [2]四川大学水利水电学院,四川成都610065

出　　处：《化工矿物与加工》2017年第6期33-36,共4页Industrial Minerals & Processing

基　　金：河南省科技攻关计划项目(172102310706);河南省高等学校重点科研项目(16A440001)

摘　　要：巷道开挖后围岩及支护结构稳定性影响因素较多,应力及变形破坏理论求解困难。针对单一砂岩条件下的地下巷道,利用FLAC^(3D)软件,分析在支护和未支护两种工况下,巷道直径、埋藏深度和原岩应力场侧压系数等因素对巷道围岩及支护结构的应力、位移和塑性区半径的影响,得出了两种工况下不同因素对围岩及支护结构的影响规律。研究结论能够为地下巷道设计和施工提供依据和参考。The stability of surrounding rocks and support structure after underground tunnel excavation was influenced by numerous factors and it is difficult to be solved by utilizing the stress and displacement failure theory. The law that different factors influence the stress and plastic zone distribution of surrounding rocks and support structure were obtained under two calculation conditions for the single-sandstone-layer underground tunnel by analyzing the effects of tunnel diameter, buried depth and side pressure coefficient and other factors on stress, displacement and plastic zone radius of tunnel＇s surrounding rocks and supporting structure with FLAC^3D and under the two calculation conditions of supporting and non-supporting. The research results can provide a basis and reference for the underground tunnel design and construction.

关 键 词：单一砂岩 巷道围岩 支护结构 稳定性 数值模拟 

分 类 号：TD32[矿业工程—矿井建设]