Abstract Open-pit mining generates a large volume of waste rocks (WR) that are deposited as unsaturated piles on the surface. WR are mainly characterised by the high heterogeneity of their hydrogeological, mineralogical and physical proprieties. The main objectives of this study consist of: i) a detailed characterisation of WR from Canadian Malartic mine in Malartic city (Quebec, Canada), ii) the use of environmental desulphurisation of the three classified waste rocks main lithologies to reduce their acid generation potential and iii) the recovery of the residual precious metals (e.g. Au, Ag). The studied materials were sampled after blasting while ensuring their representativity. Each lithology was first screened based on the DPLS (diameter of physical locking of sulphides) to remove the inert fraction higher than 2.4 mm. Then, the fraction (

中文翻译：

---

上游环境脱硫和废石增值作为可持续的 AMD 管理方法

摘要 露天开采会产生大量的废石（WR），这些废石以不饱和桩的形式沉积在地表。WR 的主要特点是其水文地质、矿物学和物理性质的高度异质性。本研究的主要目标包括：i) 详细描述来自 Malartic 市（加拿大魁北克省）的 Canadian Malartic 矿的 WR，ii) 使用三种分类废石主要岩性的环境脱硫以降低其产酸潜力iii) 回收残留的贵金属（例如金、银）。所研究的材料在爆破后取样，同时确保其代表性。每个岩性首先根据 DPLS（硫化物物理锁定直径）进行筛选，以去除高于 2.4 毫米的惰性部分。然后，分数（