Coupled thermal-hydraulic-mechanical model during rock damage and its preliminary application
Coupled thermal-hydraulic-mechanical model during rock damage and its preliminary application
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DOI：
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发表时间：
2009
影响因子：
1.5
通讯作者：
Zhu Wancheng;Wei Chenhui;Tian Jun;Yan Tianhong;Tang Chun-an
中科院分区：
文献类型：
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作者：
Zhu Wancheng;Wei Chenhui;Tian Jun;Yan Tianhong;Tang Chun-an
摘要：岩石破坏过程中的热-水-力耦合问题对深部开采等工程应用具有重要意义。基于固体和流体的质量守恒和能量守恒，将损伤作为控制THM耦合的关键因素，建立了岩石破坏过程中THM耦合模型。首次利用所提出的THM模型对弹性介质的THM响应进行了数值模拟，并将数值结果与解析解进行了比较，验证了所提出的THM模型的有效性。其次，利用该THM模型预测了不同地应力条件下岩石的耦合水力学响应。数值模拟结果表明，与不考虑流-力耦合时的数值模拟结果相比，水压的作用不仅有利于拉伸损伤的发生，扩大了拉伸损伤区的范围，而且抑制了剪切损伤的发生。关键词：岩石损伤; THM耦合;耦合THM模型;数值模拟
Abstract: The thermal-hydraulic-mechanical (THM) coupling during the rock failure is of great significance for many engineering applications such as deep underground mining. A coupled THM model during the rock failure is proposed based on the conservation of mass and energy of solid and fluid when the damage is considered as a key factor that controls the THM coupling. The proposed THM model is firstly utilized to simulate the THM response of elastic medium; and it is validated by comparing the numerical results with the analytical solutions. Secondly, this THM model is employed to predict the coupled hydromechanical response of rock under different in-situ stress conditions. The numerical simulations indicate that, compared with the numerical results without hydromechanical coupling, the hydraulic pressure can not only facilitate the tensile damage and extend the range of tensile damage zone, but also restrain the occurrence of shear damage. Key words: rock damage; THM coupling; coupled THM model; numerical simulation