岩石损伤过程中的热-流-力耦合模型及其应用初探  

Coupled thermal-hydraulic-mechanical model during rock damage and its preliminary application

作　　者：朱万成[1] 魏晨慧[1] 田军[1] 杨天鸿[1] 唐春安[2] 

机构地区：[1]东北大学岩石破裂与失稳研究中心,沈阳110004 [2]大连理工大学岩石破裂与失稳研究中心,大连116024

出　　处：《岩土力学》2009年第12期3851-3857,共7页Rock and Soil Mechanics

基　　金：国家重点基础研究发展计划(973计划)项目(No.2007CB209405);国家自然科学基金资助项目(Nos.50874024;50674025;50934006);教育部科学技术研究重点项目(No.108038);新世纪优秀人才支持计划资助项目(No.NCET-06-0291);辽宁省自然科学基金(No.20082027)

摘　　要：岩石损伤过程热-流-力(THM)耦合问题的研究对于深部采矿等许多工程领域都具有重要的理论意义。以岩石的损伤为主线,在多场耦合分析方程中引入损伤变量,基于质量守恒和能量守恒原理,提出岩体损伤过程中的THM耦合模型。通过把均匀弹性介质THM耦合响应的模拟结果与理论分析结果进行对比,验证了程序及有限元实施的正确性。然后,用该耦合模型进行了不同地应力条件下流固耦合过程的数值模拟,探讨了水压力对于岩石损伤过程的作用机制。数值模拟表明,水压力导致了拉伸损伤范围的扩大和损伤程度的加剧,同时亦对剪切损伤具有抑制作用。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.

关 键 词：岩石损伤 热-流-力(THM)耦合 耦合模型 数值模拟 

分 类 号：O346.5[理学—固体力学]