| 煤/瓦斯突出过程中煤介质局部化破坏的损伤机理 |
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| 引用本文： | 张我华. 煤/瓦斯突出过程中煤介质局部化破坏的损伤机理[J]. 岩土工程学报, 1999, 21(6): 731-736 |
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| 作者姓名： | 张我华 |
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| 作者单位： | 浙江大学岩土工程研究所!杭州；310027； |
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| 基金项目： | 国家教委回国留学人员研究启动基金 |
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| 摘 要： | 提出了一种煤／ 瓦斯突出过程中煤介质失效破坏局部化的损伤机理的数值分析模型。模型的理论基础是将损伤力学与煤层中瓦斯气迁移的理论通过局部化处理相结合。模型中考虑了气体流动，瓦斯吸附，煤介质的变形及煤层中损伤的发展与传播间的相互影响。该模型被用于有限元分析。通过数值模拟阐述了以局部化损伤模型为基础的煤／ 瓦斯突出机理。
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| 关 键 词： | 损伤发展 孔隙率演变 煤/瓦斯突出 瓦斯迁移 甲烷吸附 局部破坏的传播 |
Damage mechanism of local failure in coal seams during coal/gas outbursts |
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| Zhang Wohua. Damage mechanism of local failure in coal seams during coal/gas outbursts[J]. Chinese Journal of Geotechnical Engineering, 1999, 21(6): 731-736 |
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| Authors: | Zhang Wohua |
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| Affiliation: | Institute of Geotechnical Engineering Zhejiang University Hangzhou 310027 |
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| Abstract: | This paper presents a numerical model for the damage mechanism of local failure in coal seams during outbursts. The theoretical basis for this modeling is the damage mechanics combined with the theory of methane gas migration in coal seams in terms of localization approach. The interaction of gas folw,methane desorption,coal deformation and development and propagation of damage in coal seams have been taken into account. This model has been incorporated into the finite element analysis.The mechanism of coal/gas outbursts based on the present localization model has been illustrated through numerical results. |
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| Keywords: | damage growth porosity evolution coal/gas outburst gas migration medthane desorption failure localization |
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