Re-Design of Mine Tailings Storage Facility for Adamus Resources Limited

Ghana Mining Journal Pub Date : 2019-12-22 DOI:10.4314/GM.V19I2.4

B. Owusu-Yeboah, D. M. Gyimah, C. Akayuli

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Abstract

AbstractThe suitability of a centerline or upstream design as a sustainable option for construction of future raises for the existing Life of Mine (LoM) downstream Tailings Storage Facility (TSF) at Adamus Resources Limited (ARL) was investigated using Slope/W in GeoStudio Software. Review of technical information, evaluation of the performance of the existing Stage 6 dam, and geotechnical investigations of available construction materials were undertaken in this research. Insights were gained about the TSF’s life cycle and current bearing capacity for intended future raises. Viable geotechnical parameters were established to define construction material specifications as well as input data for modelling the new designs. The British Standards Institute (BSI) standards were adopted for all the material testing protocols carried out at the Council for Scientific and Industrial Research-Building and Road Research Institute (CSIR-BRRI) laboratory in Kumasi. The scope of modelling covered the original downstream as well as the centerline and upstream options. The geometric design and stability analysis focused only on the southern and northern embankments of the TSF. The modelling outputs yielded reliable Stability Factors of Safety (FoS) for all designs investigated, above the regulatory criteria. Subsequently, a semi-quantitative multi-criteria evaluation was used to select the preferred option between the centreline and upstream alternatives. The results showed that technically, economically and by regulatory compliance, the centreline design is a better alternative and therefore recommended for adoption by ARL. Keywords: Tailings Storage Facility, Geotechnical Parameters, Stability Analysis, Modelling, Multi-Criteria

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阿达姆斯资源有限公司尾矿储存设施的重新设计

摘要利用GeoStudio软件中的Slope/W，对Adamus Resources Limited (ARL)现有矿山寿命期(LoM)下游尾矿储存设施(TSF)的中线或上游设计作为未来建设的可持续选择的适用性进行了研究。本研究进行了技术资料审查、现有6期大坝性能评估以及可用建筑材料的岩土工程调查。深入了解了TSF的生命周期和当前对未来预期加薪的承受能力。建立可行的岩土参数来定义建筑材料规格，以及为新设计建模输入数据。在库马西的科学和工业研究委员会建筑和道路研究所(CSIR-BRRI)实验室进行的所有材料测试协议都采用了英国标准协会(BSI)的标准。建模的范围涵盖了原始的下游以及中心线和上游选项。几何设计和稳定性分析只集中在TSF的南岸和北岸。建模结果为所有被调查的设计提供了可靠的稳定安全系数(FoS)，高于监管标准。随后，采用半定量多标准评估，在中线和上游替代方案之间选择首选方案。结果表明，从技术、经济和法规合规性方面来看，中心线设计是一种更好的选择，因此被ARL推荐采用。关键词:尾矿库，岩土参数，稳定性分析，建模，多准则

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Ghana Mining Journal

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