Influence of climate change, winter season, and runoff on the performance of cover systems to control acid mine drainage

气候变化、冬季和径流对控制酸性矿井排水的覆盖系统性能的影响

• 批准号: RGPIN-2022-04758
• 负责人: Bussière, Bruno
• 金额: $ 6.4万
• 依托单位: Université du Québec en Abitibi-Témiscamingue
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=757519
• 关键词: Influence; climate; change; winter; season

One of the most serious and complex environmental challenges in the mining industry is the reclamation of acid-generating mine wastes. To solve this problem, different types of cover systems are used to control acid mine drainage (AMD) in mine waste disposal areas under different circumstances. Notable cover systems include: low saturated hydraulic conductivity covers (LSHCC), covers with capillary barrier effects (CCBE), covers combined with an elevated water table (EWT), and insulation covers (IC). The goal of the proposed research program is to improve the assessment of cover performance by: considering the influence of climate change (CC), integrating changes in the reactivity of mine wastes during wintertime, and more precisely estimating runoff in water balance calculations. Thus, the research program is divided into three distinct projects: 1) Integrating CC into the design of cover systems; 2) Assessing the reactivity of covered mine wastes during wintertime; and 3) Improving cover system water balance calculations through improved estimations of runoff. The research program will use a combination of laboratory tests, field investigations, and numerical analyses to meet the research objectives. Given the interdisciplinary nature of the proposal, projects will involve collaboration with climate experts and/or vegetation specialists. This research program will advance knowledge related to the performance of cover systems used to reclaim acid-generating generating mine waste disposal areas. The development of effective reclamation strategies is becoming an increasingly crucial factor in gaining the social acceptance of local communities who need to be convinced that a proposed mine will not significantly impact the quality of the local environment. Thus, this research program is more necessary than ever to maintain a level of social acceptance that will allow for the continued development of mines across Canada. The work will be performed by HQP (1 PDF - 1.5 years, 2 PhD, 2 MSc, 1 UG) who will gain the skills necessary to become specialists in reducing the environmental impacts of hard rock mines.

采矿业中最严重和最复杂的环境挑战之一是回收产生酸的矿山废物。为解决这一问题，在不同的环境条件下，采用不同类型的覆盖系统对矿山排土场酸性矿井水进行治理。值得注意的覆盖系统包括：低饱和导水率覆盖层（LSHCC）、具有毛细屏障效应的覆盖层（CCBE）、与高水位相结合的覆盖层（EWT）和绝缘覆盖层（IC）。拟议的研究计划的目标是提高覆盖性能的评估：考虑气候变化（CC）的影响，整合在冬季矿山废物的反应性的变化，更精确地估计径流水平衡计算。因此，该研究计划分为三个不同的项目：1）将CC纳入覆盖系统的设计; 2）评估覆盖矿山废物在冬季的反应性; 3）通过改进径流的估计来改进覆盖系统的水平衡计算。该研究计划将使用实验室测试，现场调查和数值分析相结合，以满足研究目标。鉴于该提案的跨学科性质，项目将涉及与气候专家和/或植被专家的合作。 这项研究计划将推进知识有关的覆盖系统的性能，用于回收产酸产生的矿山废物处理区。制定有效的复垦战略正成为获得当地社区社会接受的一个日益重要的因素，需要使当地社区相信，拟议的矿山不会对当地环境质量产生重大影响。因此，这项研究计划比以往任何时候都更有必要保持一定的社会接受程度，使加拿大各地的地雷继续发展。这项工作将由HQP（1个PDF - 1.5年，2个博士，2个硕士，1个UG）执行，他们将获得必要的技能，成为减少硬岩矿山环境影响的专家。