| 地下采场动态施工损伤演化的数值试验 |
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| 引用本文： | 刘庭金,莫海鸿.地下采场动态施工损伤演化的数值试验[J].岩土力学,2005,26(12):1901-1906. |
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| 作者姓名： | 刘庭金 莫海鸿 |
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| 作者单位： | 华南理工大学,土木工程系,广州,510640 |
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| 摘 要： | 采用莫尔-库仑准则作为岩体的剪切屈服条件、极限应变作为剪切损伤判据、最大拉应力作为拉伸损伤判据,建立了适合岩体的弹塑性各向异性损伤数值模型。运用该数值模型研究了施工过程不施作支护结构和施作支护结构情况下地下采场覆岩的动态损伤演化过程,并与不施作支护结构时岩体采用弹性模型的数值结果进行了对比。数值试验重现了施工过程地下采场覆岩的动态损伤演化过程,从而为进一步优化支护结构设计、施工以及预防和控制地下采场塌方等工程事故提供了一种新的数值试验手段。
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| 关 键 词： | 损伤判据 弹塑性 各向异性损伤 施工过程 地下采场 损伤演化 数值试验 |
| 文章编号： | 1000-7598-（2005）12-1901-06 |
| 收稿时间： | 2004-06-05 |
| 修稿时间： | 2004-08-04 |
Numerical test on staged damage evolution of underground stope in construction |
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| LIU Ting-jin,MO Hai-hong.Numerical test on staged damage evolution of underground stope in construction[J].Rock and Soil Mechanics,2005,26(12):1901-1906. |
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| Authors: | LIU Ting-jin MO Hai-hong |
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| Institution: | Department of Civil Engineering, South China University of Technology, Guangzhou 510640, China |
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| Abstract: | An elastoplastic anisotropic damage numerical model for rock is established by adopting Mohr-Coulomb criterion as the shearing yield condition,ultimate strain as the shearing damage criterion,and maximal tensile stress as the tension damage criterion.The staged damage evolution of underground stope is emphatically numerically studied in the construction process with supporting structure and without supporting structure;and the deformation field of underground stope is also numerically calculated on the supposing that rock as an elastic material.The numerical test reproduces the staged damage evolution of underground stope in the construction process;and it provides a means to optimize the design and construction process of underground stope,to effectively prevent and control some engineering accidents such as collapse. |
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| Keywords: | damage criterion elastoplastic anisotropic damage construction process underground stope damage evolution numerical test |
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