Investigation, testing and verification in support of advanced EDZ modelling

核废料管理组织（NWMO）调查管理加拿大用过核燃料（高水平废料）的方法。所有生产核能的国家都在积极探索长期保护这些废物的计划，而地下深层地质储存库（DGR）是普遍首选的选择。长期以来，NWMO一直是关于开挖损伤区（EDZ）力学演化的基础和应用机构研究的关键支持者，包括对岩石力学测试协议和技术的重要改进，在众多尺度上的监测方法，开发新的模拟工具，以及改进所有阶段损伤演化的预测工具。这种合作研究是必不可少的，因为对我们预测包含这些存储库的岩体热-水-机械（THM）响应的能力的要求远远超出了对地下基础设施的传统设计期望，并要求开发新的工具和理解。这项工作的结果将用于提高我们解决与核废料储存库相关的许多长期问题的能力，并为深层储存库的地下设计建立协议和损害管理策略。这项工作的重点是推进和整合现场调查、样品选择、力学测试和先进的岩石连续/非连续混合分析的协议和工具，以更准确地模拟从晶体、实验室样品到完整储库尺度的所有尺度的EDZ力学。对于低孔隙度沉积岩和多晶火成岩来说，THM耦合是一个复杂的问题，这两种主要的地质环境被认为是加拿大高放废物库的主要地质环境。与所有这些问题相关的是，在这些固体中未连通的排水不良孔隙空间中，水和饱和度的作用。所有这些复杂的基本力学和相关的次要影响，包括地下储存库超长设计寿命的时间变化，都将在本项目中进行研究。该项目将资助7名硕士，6名博士和1名研究助理

The Nuclear Waste Management Organization (NWMO) investigates approaches for managing used nuclear fuel (high level waste) in Canada. All countries that produce nuclear energy are actively exploring plans to secure this waste for the long term and underground deep geological repositories (DGR) are the universally preferred option. NWMO has long been a key supporter of fundamental and applied institutional research regarding the mechanical evolution of excavation induced damage zones (EDZ) including crucial enhancements to rock mechanics testing protocols and techniques, monitoring approaches at numerous scales, development of new simulation tools, and the improvement of predictive tools for all stages of damage evolution. This collaborative research is essential as the requirements placed on our ability to forecast the rock mass thermal-hydro-mechanical (THM) response containing these repositories far exceed traditional design expectations for underground infrastructure and mandate the development of new tools and understanding. The results from this work will be used to advance our ability to address many of the long-term issues associated with nuclear waste repositories and establish protocols and damage management strategies for underground design of deep repositories. The focus of this work is to advance and integrate protocols and tools for site investigation, sample selection, mechanical testing and advanced continuum/ discontinuum hybrid analysis of rock to more accurately simulate EDZ mechanics at all scales from the crystalline, laboratory sample and full repository scales. THM coupling is a complex issue for low porosity sedimentary rocks and poly-crystalline igneous rocks, the two primary geological environments being considered for high level waste repositories in Canada. Related to all of these issues is the role of water and saturation levels within non-connected poorly drained pore spaces within these solids. All of these complications to fundamental mechanics and associated secondary effects including temporal changes over the ultra-long term design life of an underground repository will be studied in this project. 7 MSc's, 6PhD's and 1 research assistant will be funded by this project.************************