Integrated characterization of waste rock at the Detour Lake Mine

Detour Lake 矿废石的综合表征

• 批准号: 485334-2015
• 负责人: Blowes, David
• 金额: $ 3.5万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=645647
• 关键词: Integrated; characterization; waste; rock; Detour

Open pit mining at the Detour Lake gold mine is generating large volumes of waste rock that need to be managed to minimize the release of acid rock drainage. Previous mining operations at the Detour Lake site, from 1983 to 1999, resulted in the construction of four waste-rock stockpiles. Two of these stockpiles were excavated during the development of the current Detour Lake mine. Two stockpiles remain in place. These stockpiles have 16 years of operating history and 15 years of post-closure history under site conditions, and represent a valuable opportunity to examine the reactivity of rock types from the Detour Lake site, which can be used to improve water quality predictions. The stockpiles also provide an opportunity to understand the performance of waste-rock closure strategies used following the previous operation and provide a basis for**improved closure designs.**The proposed research at the Detour Lake site will include investigations on existing covered waste rock stockpiles 3 and 4 to develop a detailed analysis of the water balance for these stockpiles, to assess the impact of leachate from the stockpiles on underlying aquifers, and to assess the performance of the thin soil covers as a waste-rock management system. Additional investigations will focus on the new mineralized-waste stockpile (MWS) to assess potential interactions between the MWS leachate and the underlying foundation materials. The proposed research program will contribute a critical linkage between direct observations of historic rock stockpiles that have been weathering under natural field conditions for 31 years and freshly deposited stockpiles. It is expected that this study will lead to improved techniques for predicting and managing the**long-term quality of effluent from waste-rock stockpiles.**

Detour Lake金矿的露天采矿产生了大量废石，需要对其进行管理，以最大限度地减少酸性岩石排水的释放。从1983年到1999年，Detour湖的采矿作业导致建造了四个废石储存库。其中两个库存是在开发目前的Detour Lake矿山期间挖掘的。目前仍有两个储存。这些库存在现场条件下有16年的运行历史和15年的关闭后历史，代表了一个宝贵的机会，可以检查Detour湖现场岩石类型的反应性，这可以用来改善水质预测。这些库存还提供了一个机会，使人们能够了解上次作业后采用的废石关闭战略的绩效，并为 ** 改进关闭设计 ** 提供了依据。Detour湖场地的拟议研究将包括对现有覆盖的废石储存3和4进行调查，以详细分析这些储存的水平衡，评估储存的渗滤液对下层含水层的影响，并评估薄土覆盖层作为废石管理系统的性能。进一步的调查将集中在新的矿化废物储存（MWS），以评估MWS渗滤液和基础材料之间的潜在相互作用。 拟议的研究计划将有助于直接观察在自然野外条件下风化31年的历史岩石库存和新沉积库存之间的关键联系。预计这项研究将改进预测和管理 ** 废石储存流出物的长期质量的技术。