露天矿边界品位计算机辅助优化

J. Muriuki, V. Temeng
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引用次数: 1

摘要

除其他职责外,一个矿山规划小组的任务是设计一个可行的矿山计划,从而规划出采矿项目的日常运行。矿山计划围绕着一个截止品位,该截止品位是经过深思熟虑和独特选择的,同时考虑了矿山特定的品位、吨位分布、经济和操作参数等各个方面。选择截止分数是一项艰巨的任务,通常涉及迭代和冗长的数学公式,需要花费大量时间来执行,通常会留下错误的空间。如果出现此类错误,采矿项目可能面临一系列结果,甚至可能导致过早关闭。因此,截止品位是一个战略变量,决定了矿山的经济可行性,从而决定了投资回报。为了使净现值最大化,临界值必须是最优的。Lane的方法是一个利用几个步骤来产生一个截止等级值的模型。该算法是灵活的,可以调整,以包括其他因素具体到一个矿山。令人遗憾的是,许多矿业公司继续使用错误计算或假设的不准确的截止品位来经营。由于损失和过早弃置地雷,这种情况不断造成挫折。本研究的重点是开发和实现一个易于使用的计算机应用程序,该应用程序基于Lane的方法,运行在Windows平台上,因此针对更大的用户群来选择露天矿山的最佳截止品位。关键词:截止优化,截止优化器,最佳截止等级,惠特尔
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Computer-Aided Cut-off Grade Optimisation for Open Pit Mines
A mine planning team is tasked among other duties with designing a feasible mine plan which in turn maps out the daily running of the mining project. A mine plan revolves around a cut-off grade which is thoughtfully and uniquely selected while considering various aspects such as grade tonnage distribution, economic and operational parameters specific to a mine. Selection of a cut-off grade can be a daunting task often involving iterative and lengthy mathematical formulas which take huge amounts of time to execute, often leaving room for error. In the occurrence of such errors, a mining project can be faced with sequential outcomes that could even lead to premature closure. The cut-off grade is therefore a strategic variable that determines the economic viability of a mine, and hence return on investment. It is critical that the cut-off grade is optimal so as to maximise the net present value. Lane’s approach is a model that utilises several steps to yield one cut-off grade value. This algorithm is flexible and can be adjusted to include other factors specific to a mine. Regrettably, many mining companies continue to operate using inaccurate cut-off grades wrongly calculated or assumed. This has continuously led to frustrations due to losses and prematurely abandoned mines. This study focused on the development and implementation of an easy to use computer application based on Lane’s approach that runs on Windows platform, and hence targeting a larger user base for choosing an optimum cut-off grade for open pit mines. Keywords: Cut-Off Optimisation, Cut-Off Optimiser, Optimum Cut-Off Grades, Whittle
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