| 大相岭隧道岩爆数值模拟预测研究 |
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| 引用本文： | 李建军,张志强.大相岭隧道岩爆数值模拟预测研究[J].铁道建筑技术,2011(1):38-43. |
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| 作者姓名： | 李建军 张志强 |
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| 作者单位： | 1. 中铁十二局集团第三工程有限公司,太原,030024
2. 西南交通大学土木工程学院,成都,610031 |
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| 摘 要： | 从大相岭隧道实测原始地应力入手,对不同的地应力场具有针对性地建立二维、三维数值模型,来进行岩爆时空效应的数值模拟研究。二维模型通过采用不同地应力释放率,来考虑岩爆发生的时间效应,且确定出岩爆易发生的隧道部位及最大地应力沿洞周分布规律和范围。同时采用三维模型,探明了大相岭隧道在两种不同特征地应力场中开挖时最大地应力的分布规律,并得出了最大主应力分布范围与开挖进尺及支护的关系,具有一定的实际意义。
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| 关 键 词： | 大相岭隧道 岩爆预测 时空效应 数值模拟 |
On Numerical Simulation Forecast of Rock Burst in Daxiangling Tunnel |
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| Li Jianjun,Zhang Zhiqiang.On Numerical Simulation Forecast of Rock Burst in Daxiangling Tunnel[J].Railway Construction Technology,2011(1):38-43. |
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| Authors: | Li Jianjun Zhang Zhiqiang |
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| Institution: | Li Jianjun1,Zhang Zhiqiang2(1.China Railway 12~(th) Bureau Group Co.Ltd.,Taiyuan 030024,China,2.Civil Engineering College,Southwest Jiaotong University,Chengdu 610031,China) |
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| Abstract: | From the surveyed initial goestress in Daxiangling Tunnel,and by establishing two-dimensional and three-dimensional numerical models for different geostress fields respectively,this paper carries out numerical simulation studies on space-time effects of rock burst.The two-dimensional model considers the time effects of rock burst by adopting release rates of different geostresses,and determines the tunnel parts which are fragile to rock burst,as well as the distribution laws and areas of the maximum geostre... |
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| Keywords: | daxiangling tunnel rock burst forecast space-time effect numerical simulation |
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