中文摘要：

介绍国际合作研究计划DECOVALEX—THMC的TASK B关于结晶岩开挖损伤区温度-水流-应力-化学耦合研究的部分进展情况，给出结晶岩开挖损伤区温度-水流-应力-化学耦合研究的基本研究思路，以典型地下实验室（如瑞典Aspǒ硬岩实验室）的试验为基础，进行开挖损伤区的形成与演化机制规律分析，建立弹性、弹塑性、黏弹塑性的THMC分析模型，开发高效的数值分析软件系统，并分析结晶岩开挖损伤区温度-水流-应力-化学耦合作用行为，通过各个研究小组背靠背的研究，然后进行成果对比、相关专家对分析结果的技术审查，以及修改和更新，以获得比较准确模拟结晶岩开挖损伤区的THMC模型。在此基础上，形成结晶岩开挖损伤区温度-水流-应力-化学耦合研究工作指南，为高放核废物地质处置研究工作提供理论、方法和技术支持。

英文摘要：

This paper presents the development of thermo-hydro-mechano-chemical（THMC） studies on excavation damage zone（EDZ） in crystalline rocks, which is an important part of international cooperative project DECOVALEX-THMC, denoted TASK B. The basic idea of THMC coupling studies of EDZ in crystalline rock is introduced. The mechanism of EDZ formation and evolution can be characterized and analyzed based on typical experiments carried out in underground laboratory（for example, Aspǒ HRL）. Then the THMC models of elasticity, elastoplasticity and visco-elastoplasticity and so on can be built and the associated codes can be developed. The behaviors of THMC coupling in EDZ of crystalline rock will be analyzed by using these codes. Comparisons of the results between each research group in different countries and technical evaluation on the models that each group used will be conducted by experts or scientists majored in this field. By doing so, the model and method that each group developed will be updated according to the evaluation results and the THMC model in EDZ of crystalline rock will be obtained appropriately. The guidance document of THMC studies in EDZ of crystalline rock can be compiled based on the work described above; and it can provide technical supports for the studies of underground disposal for high-level nuclear waste disposal.