The production of solid mine wastes is an integral part of the extraction and metallurgical processing of ores. The reclamation of highly reactive mine waste, with low neutralizing potential, is still a significant challenge for the mining industry, particularly when natural soils are not available close to the site. Some solid mine wastes present interesting hydro-geotechnical properties which can be taken advantage of, particularly for being used in reclamation covers to control acid mine drainage. The main objective of this research was to evaluate the use of mining materials (i.e., tailings and waste rock) in a cover with capillary barrier effects (CCBE) to prevent acid mine drainage (AMD) from highly reactive tailings. The first part of the project reproduced in this article involves context and laboratory validation of mining materials as suitable for a CCBE, while the companion paper reports laboratory and field results of cover systems made with mining materials. The main conclusions of the Part 1 of this study were that the materials studied (low sulfide tailings and waste rocks) had the appropriate geochemical and hydrogeological properties for use as cover materials in a CCBE. Results also showed that the cover mining materials are not acid-generating and that the LaRonde tailings are highly reactive with pH close to 2, with high concentrations of metals and sulfates.

中文翻译：

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回收的高反应性尾矿的水文地球化学行为，第1部分：填海材料的表征

固体矿山废料的生产是矿石提取和冶金加工的组成部分。具有低中和潜力的高反应性矿山废料的回收对于采矿业仍然是一个重大挑战，特别是在场地附近没有天然土壤的情况下。一些固体矿山废料具有令人关注的水力地质技术特性，可以利用这些特性，特别是用于填海覆盖层中以控制酸性矿山的排水。这项研究的主要目的是评估具有毛细屏障效应（CCBE）的覆盖层中采矿材料（即尾矿和废石）的使用，以防止酸性矿山排水（AMD）的高反应性尾矿。本文转载的项目的第一部分涉及适用于CCBE的采矿材料的环境和实验室验证，而随附的论文报告了用采矿材料制成的覆盖系统的实验室和现场结果。这项研究的第1部分的主要结论是，所研究的材料（低硫化物尾矿和waste石）具有合适的地球化学和水文地质特性，可用作CCBE的覆盖材料。结果还表明，表层采矿材料不会产生酸，LaRonde尾矿在pH接近2时具有高反应活性，并含有高浓度的金属和硫酸盐。这项研究的第1部分的主要结论是，所研究的材料（低硫化物尾矿和waste石）具有合适的地球化学和水文地质特性，可用作CCBE的覆盖材料。结果还表明，表层采矿材料不会产生酸，LaRonde尾矿在pH接近2时具有高反应活性，并含有高浓度的金属和硫酸盐。这项研究的第1部分的主要结论是，所研究的材料（低硫化物尾矿和waste石）具有合适的地球化学和水文地质特性，可用作CCBE的覆盖材料。结果还表明，表层采矿材料不会产生酸，LaRonde尾矿在pH接近2时具有高反应活性，并含有高浓度的金属和硫酸盐。