碳税和最优坡度剖面对露天矿盈利能力和排放的影响

IF 1.8 Q3 MINING & MINERAL PROCESSING
Andrea Agosti, S. Utili, James Tasker, C. Zhang, P. Knights, M. Nehring, Soab Zia
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引用次数: 0

摘要

本文研究了引入适用于采矿和加工活动的碳税所产生的财务和环境后果。其新颖性有两方面:(1)在确定最终矿坑限额(UPL)时考虑了与所有相关采矿活动产生的排放量成比例的碳税的影响,即环境成本不是后验地应用于矿坑优化,而是同时包括净现值(NPV)最大化,从而可以研究碳税价值与NPV、矿石采出量和碳排放量之间的关系;(2)利用OptimalSlope软件自动确定矿井井壁的最优地质技术剖面。以Marvin铜矿(MineLib存储库中公开的区块模型数据)为例进行研究。基于四种不同的碳税值,采用传统的平面或非线性优化坑壁,进行了几种坑壁优化。结果表明,碳税值与净现值、矿石开采量和碳排放量之间的关系在平面和最佳坑壁剖面中均呈线性关系。此外,在不影响UPL安全性的前提下,采用最佳配置文件可实现高达2.15亿澳元的收益。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The effect of carbon tax and optimal slope profiles on profitability and emissions of open pit mines
ABSTRACT This paper investigates the financial and environmental consequences stemming from the introduction of a carbon levy applied to mining and processing activities. The novelty is twofold: (1) the effect of a carbon tax, proportional to the emissions produced by all relevant mining activities, is accounted for in the determination of the Ultimate Pit Limit (UPL), i.e. the environmental costs are not applied a posteriori to pit optimization but included concurrently to Net Present Value (NPV) maximization, allowing to investigate the relationship between carbon tax value versus NPV, amount of ore extracted and carbon emissions; (2) we use a new software, OptimalSlope, to automatically determine geotechnically optimal profiles for the mine pitwalls. The Marvin copper deposit (block model data publicly available from MineLib repository) was adopted as a case study. Several pit optimizations were performed based on four different values of carbon tax and adopting either traditional planar or non-linear optimal pitwalls. It emerges that the relationships between carbon tax value versus NPV, amount of ore extracted, and carbon emissions exhibited linearity in both cases of planar and optimal pitwall profiles. Moreover, the adoption of optimal profiles realizes gains up to 215 million AUD, without compromising the safety of the UPL.
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来源期刊
CiteScore
2.20
自引率
9.10%
发文量
5
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