Coupled Thermo-Hydro-Mechanical-Chemical Behaviour of Cemented Paste Backfill in Static and Dynamic Loading Conditions, and Application to their Engineering Design

胶结膏体充填体（CPB）是一种由尾矿、胶结料和水混合而成的充填体，广泛应用于采矿业。其主要目的是确保地下开口的稳定性，安全和最大限度地回收矿石，并提供一种环境友好的地下处置潜在产酸尾矿的方法。为确保上述作用，CPB结构必须表现出可接受的性能，例如在静态和动态负载条件下的足够机械稳定性，可接受的环境行为和成本。在现场，CPB结构一旦建成，从早期到晚期同时经受机械（M）、液压（H）、化学（C）和热（T）载荷。CPB的性能和设计的可靠评估绝对需要在静态和动态载荷条件下集成这些耦合THMC过程。因此，先进的实验和建模技术相结合的基础上，新的方法和工具的CPB的THMC负载在静态和动态加载条件下的研究，确定并提出在本研究计划。这项研究将有助于降低回填作业成本，提高矿山生产率，同时改善矿山工人的健康和安全，并遵守适用且日益复杂的环境法规。本文提出的所有工作都是新颖的，因此新的知识和创新是预期的，并将提供给科学，工程和采矿界，以及公众。这项研究还将提供机会，培养四个博士生，四个硕士生，六个第四年。嗯。学生和一名地质技术员。HQP将在基础和应用研究方面获得坚实的基础，并通过最先进的研究工具获得非常广泛的宝贵实践经验，实验和建模技能。他们将获得研究生学位，在加拿大的一个关键研究领域获得理论，建模和实验技能：技能，这是立即有用的，并受到行业，政府机构和学术界的重视。

Cemented paste backfill (CPB), a mix of tailings, binder and water, is extensively used in the mining industry. Its main purpose is to ensure the stability of underground openings, safe and maximum ore recovery, and also to provide an environmental-friendly means of underground disposal of potential acid generating tailings. To assure the roles mentioned above, the CPB structure must show acceptable performance such as sufficient mechanical stability under static and dynamic loading conditions, acceptable environmental behaviour and cost. In the field, a CPB structure is simultaneously subjected to mechanical (M), hydraulic (H), chemical (C), and thermal (T) loads from early to advanced ages once it has been built. A reliable assessment of the performance and the design of CPB absolutely require the integration of these coupled THMC processes under static and dynamic loading conditions. Therefore, based on the combination of advanced experimental and modeling techniques, novel methods and tools for the study of the response of CPB to THMC loads in static and dynamic loading conditions are identified and proposed in this research program. This research will contribute to decreasing backfill operation costs, increasing mine productivity, while at the same time, improving the health and safety of mine workers and respecting applicable and increasingly complex environmental regulations. All the work proposed herein is novel, so new knowledge and innovation are anticipated and will be made available to the scientific, engineering and mining communities, and the general public. This research will also provide opportunities to train four PhD students, four Master's students, six 4th y. und. students, and one geotechnical technician. The HQPs will receive strong foundation in fundamental and applied research as well as gain an exceptionally broad range of valuable hands-on experience, experimental and modelling skills with state-of-the-art research tools. They will obtain their graduate degrees having acquired theoretical, modeling and experimental skills in a key research area for Canada: skills, which are immediately useful and valued by industry, governmental settings and academia alike.