| 深部岩柱在动态扰动下力学响应的数值模拟 |
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| 引用本文： | 隋斌,朱维申,李树忱.深部岩柱在动态扰动下力学响应的数值模拟[J].岩土力学,2009,30(8):2501-2505. |
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| 作者姓名： | 隋斌 朱维申 李树忱 |
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| 作者单位： | 山东大学,岩土与结构工程研究中心,济南,250061 |
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| 基金项目： | 国家自然科学基金重点项目，国家自然科学基金面上项目，国家973项目 |
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| 摘 要： | 在复杂应力状态下对深部岩柱动态扰动的力学响应进行了数值模拟.通过改变侧压系数,来改变岩柱所受的地应力状态,进而分析不同应力状态下岩柱对外界动力扰动的力学响应;通过改变动态扰动的作用时间,来分析动态扰动时间的变化对处于不同应力状态下的岩柱稳定性的影响.数值模拟结果表明,动态扰动对巷道岩柱破坏的触发与岩柱所处的地应力状态密切相关,侧压系数越小,外界的动态扰动对其影响就越明显.动态扰动的作用时间也是影响巷道岩柱稳定的重要因素,随着应力波作用时间的延长,动态扰动给巷道稳定性带来的影响越大.
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| 关 键 词： | 深部岩体 动态扰动 侧压系数 失稳破坏 数值模拟 |
| 收稿时间： | 2008-06-20 |
Simulation of mechanical response of deep rock pillar triggered by dynamic disturbance |
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| SUI Bin,ZHU Wei-shen,LI Shu-chen.Simulation of mechanical response of deep rock pillar triggered by dynamic disturbance[J].Rock and Soil Mechanics,2009,30(8):2501-2505. |
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| Authors: | SUI Bin ZHU Wei-shen LI Shu-chen |
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| Institution: | Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, China |
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| Abstract: | The mechanical response of deep rock pillar, which is under complicated stress condition and then subjected to dynamic disturbance, is numerically simulated. Under different lateral pressure coefficients, the dynamic response characteristics of the pillar are characterized; and the effect of the duration of dynamic disturbance on the pillar stability is studied. Through the numerical analysis of the pillar in deep rock, it is found that the triggering action of dynamic disturbances is closely pertinent to the static in-situ stress condition and the action time of the dynamic disturbance. In general, it brings about greater influences on the stability of underground tunnels with the decreasing lateral pressure coefficient and with the prolonged duration of dynamic disturbance. |
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| Keywords: | deep rock dynamic disturbance lateral pressure coefficient unstable failure numerical simulation |
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