| MECHANISM AND CATASTROPHE THEORY ANALYSIS OF CIRCULAR TUNNEL ROCKBURST |
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| 作者姓名： | 潘岳 张勇 于广明 |
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| 作者单位： | College of Civil Engineering Qingdao Technological University Qingdao 266520，P. R. China，College of Civil Engineering Qingdao Technological University，Qingdao 266520，P. R. China，College of Civil Engineering Qingdao Technological University，Qingdao 266520，P. R. China |
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| 基金项目： | 中国科学院资助项目;山东省教育厅资助项目;山东省自然科学基金 |
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| 摘 要： | Mechanism of circular tunnel rockburst is that, when the carrying capacity of the centralized zone of plastic deformation in limiting state reduces, the comparatively intact part in rock mass unloads by way of elasticity; rockburst occurs immediately when the elastic energy released by the comparatively intact part exceeds the energy dissipated by plastic deformation. The equivalent strain was taken as a state variable to establish a catastrophe model of tunnel rockburst, and the computation expression of the earthquake energy released by tunnel rockburst was given. The analysis shows that, the conditions of rockburst occurrence are relative to rock's ratio of elastic modulus to descendent modulus and crack growth degree of rocks; to rock mass with specific rockburst tendency, there exists a corresponding critical depth of softened zone, and rockburst occurs when the depth of softened zone reaches.
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| 关 键 词： | 圆形隧道 塑料形变局限 岩爆 临界深度 |
| 收稿时间： | 2004-10-20 |
| 修稿时间： | 2006-01-03 |
Mechanism and catastrophe theory analysis of circular tunnel rockburst |
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| Yue Pan,Yong Zhang,Guang-ming Yu.MECHANISM AND CATASTROPHE THEORY ANALYSIS OF CIRCULAR TUNNEL ROCKBURST[J].Applied Mathematics and Mechanics(English Edition),2006,27(6):841-852. |
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| Authors: | Yue Pan Yong Zhang Guang-ming Yu |
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| Institution: | College of Civil Engineering, Qingdao Technological University, Qingdao 266520, P. R. China |
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| Abstract: | Mechanism of circular tunnel rockburst is that, when the carrying capacity of the centralized zone of plastic deformation in limiting state reduces, the comparatively intact part in rock mass unloads by way of elasticity; rockburst occurs immediately when the elastic energy released by the comparatively intact part exceeds the energy dissipated by plastic deformation. The equivalent strain was taken as a state variable to establish a catastrophe model of tunnel rockburst, and the computation expression of the earthquake energy released by tunnel rockburst was given. The analysis shows that, the conditions of rockburst occurrence are relative to rock's ratio of elastic modulus to descendent modulus and crack growth degree of rocks; to rock mass with specific rockburst tendency, there exists a corresponding critical depth of softened zone, and rockburst occurs when the depth of softened zone reaches. |
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| Keywords: | circular tunnel plastic deformation localization rockburst fold catastrophe model critical depth of softened zone |
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