| 岩石劈裂破坏过程的计算模拟 |
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| 引用本文： | 刘宁.岩石劈裂破坏过程的计算模拟[J].固体力学学报,2011(Z1). |
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| 作者姓名： | 刘宁 |
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| 作者单位： | 中国水电顾问集团华东勘测设计研究院; |
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| 基金项目： | 国家自然科学基金(青年基金)项目(51109221); 中国博士后基金面上项目(20100471757)资助 |
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| 摘 要： | 岩体的破坏主要是岩体中裂纹的扩展与贯通的结果.受压岩体的裂纹尖端,可能处于压剪状态,也可能处于拉剪状态.从断裂力学的角度,研究了地下工程围岩中的裂纹在各种受力条件下(包括拉剪、压剪两种情况)的起裂、扩展及贯通以至最终形成劈裂裂缝的特征及各个阶段的判据.针对压剪断裂,裂纹之间存在有粘结力与摩擦强度的特征,提出了岩石压剪断裂性判据.最后以受压岩体中的斜裂纹扩展过程分析为例,模拟了岩体中裂纹逐渐发展成劈裂破坏的过程,并说明了各个阶段的计算方法.
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| 关 键 词： | 劈裂 压剪断裂 裂纹扩展 断裂力学 |
COMPUTATIONAL SIMULATION ON ROCK SPLITTING FAILURE PROCESS |
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| Ning Liu.COMPUTATIONAL SIMULATION ON ROCK SPLITTING FAILURE PROCESS[J].Acta Mechnica Solida Sinica,2011(Z1). |
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| Authors: | Ning Liu |
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| Institution: | Ning Liu(HydroChina Huadong Engineering Corporation,Hangzhou,310014,China) |
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| Abstract: | Rock failure is mainly caused by crack propagation and coalescence.The tip of crack is in compress-shear or tension-shear.Based on fracture mechanics,the characteristics and failure criterions of wall rock cracks including initiation,propagation,and coalescence are analyzed systematically under different conditions.For compress-shear failure,the compress-shear failure criterion is brought out because of friction between cracks.Finally,take the compressed crack propagation analysis as an example,simulate the... |
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| Keywords: | splitting compression-shear fracture crack propagation fracture mechanics |
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