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

静态和动态加载条件下水泥浆充填体的热-水-机械-化学耦合行为及其在工程设计中的应用

• 批准号: 346129-2013
• 负责人: Fall, Mamadou
• 金额: $ 1.89万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=572521
• 关键词: Coupled; Thermo; Hydro; Mechanical; Chemical

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.

水泥浆回填 (CPB) 是尾矿、粘合剂和水的混合物，广泛用于采矿业。其主要目的是确保地下开口的稳定性、安全和最大的矿石回收率，并为潜在产酸尾矿的地下处置提供一种环保的手段。为了确保上述作用，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足够的机械稳定性、可接受的环境行为和成本。在现场，CPB 结构一旦建成，就会同时承受从早期到晚期的机械 (M)、液压 (H)、化学 (C) 和热 (T) 载荷。对 CPB 性能和设计的可靠评估绝对需要在静态和动态负载条件下集成这些耦合的 THMC 过程。因此，基于先进的实验和建模技术的结合，本研究项目确定并提出了研究 CPB 在静态和动态负载条件下对 THMC 负载响应的新方法和工具。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，因此预计将向科学、工程和采矿界以及公众提供新的知识和创新。这项研究还将提供培养四名博士生、四名硕士生、六名四年级学生的机会。和。学生和一名岩土技术员。总部项目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极其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，并获得加拿大关键研究领域的理论、建模和实验技能：这些技能立即有用并受到工业界、政府机构和学术界的重视。