| 圆形巷道围岩的环向应力及发生岩爆单元分布的数值模拟 |
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| 引用本文： | 王玮,王学滨,潘一山,陶帅. 圆形巷道围岩的环向应力及发生岩爆单元分布的数值模拟[J]. 防灾减灾工程学报, 2011, 31(3): 261-268 |
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| 作者姓名： | 王玮 王学滨 潘一山 陶帅 |
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| 作者单位： | 辽宁工程技术大学力学与工程学院; |
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| 基金项目： | 国家自然科学基金项目(50974069); 辽宁省教育厅2009年度高等学校科研项目(2009A322); 国家重点基础研究发展计划项目(2010CB226803)资助 |
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| 摘 要： | 利用FLAC模拟了不同水平方向压力(小于竖直方向压力)及岩石峰后不同脆性条件下的圆形巷道破坏过程.岩石服从莫尔-库仑剪破坏与拉破坏复合的破坏准则,破坏之后呈现应变软化-理想塑性行为.监测了模型中第1象限对角线上的单元环向应力分布及演化规律.根据徐林生和王兰生提出的环向应力岩爆判据,判断模型中各单元是否发生岩爆.模拟结果...
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| 关 键 词： | 圆形巷道 岩爆判据 V形坑 水平方向压力 岩石峰后脆性 环向应力 |
Numerical Simulation of the Distribution of Tangential Stresses and Elements Occurring Rockburst in the Surrounding Rock of a Circular Tunnel |
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| WANG Wei,WANG Xue-bin,PAN Yi-shan,TAO Shuai. Numerical Simulation of the Distribution of Tangential Stresses and Elements Occurring Rockburst in the Surrounding Rock of a Circular Tunnel[J]. Journal of Disaster Prevention and Mitigation Engineering, 2011, 31(3): 261-268 |
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| Authors: | WANG Wei WANG Xue-bin PAN Yi-shan TAO Shuai |
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| Affiliation: | WANG Wei,WANG Xue-bin,PAN Yi-shan,TAO Shuai (College of Mechanics and Engineering,Liaoning Technical University,Fuxin 123000,China) |
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| Abstract: | Rockburst process of the surrounding rock of a circular tunnel is modeled by use of FLAC.Effects of the horizontal stress that is less than the vertical stress and the post-peak brittleness of rock are studied.The rock elements exhibit linear strain-softening behavior after the occurrence of failure and ideal plastic behavior and the failure meets the composite Mohr-Coulomb criterion with tension cut-off.The tangential stress of a row of elements in the surrounding rock is monitored.The tangential stress ro... |
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| Keywords: | circular tunnel rockburst criterion V-shaped notch horizontal stress post-peak brittleness of rock tangential stress |
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