一种确定露天矿最优块体尺寸的混合模糊MCDM方法:一个实例研究

IF 1.1 Q3 MINING & MINERAL PROCESSING
J. Sharif, A. Jafarpour, S. Yousefi
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引用次数: 4

摘要

基于计算机的矿体三维建模是露天矿资源估算、品位确定和生产调度的重要步骤之一。在建模阶段,矿体模型的体积需要由区块和子区块填充。由于地质统计问题和与采矿能力相关的计算依赖于区块大小的确定,因此区块大小的确定非常重要。金属含量、估算误差、回收率、回采能力、安全性和贫化程度是确定最佳矿渣的有效因素。在这项工作中,采用两阶段方法确定最优BS。该方法采用了模糊德尔菲层次分析法(FDAHP)和模糊多目标优化比例分析法(FMOORA)。在第一阶段,根据专家的意见,使用FDAHP方法计算各指标的权重。在第二阶段,应用FMOORA方法,结合前一阶段提取的权重,确定适合采矿设计和操作的BS。以孙郡铜矿的区块模型为例,对该方法的有效性进行了评价。该方法将专家的意见转化为模糊值,根据专家的经验和技术知识对专家进行加权,利用FDAHP对各标准进行加权,并利用FMOORA选择最优方案,结果令人满意。进一步选择12.5×12.5×12.5 m3区块(A5)作为合适的BS,与所研究矿山的实际情况相适应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Hybrid Fuzzy MCDM Approach to Determine an Optimal Block Size in Open-Pit Mine Modeling: a Case Study
The computer-based 3D modeling of ore bodies is one of the most important steps in the resource estimation, grade determination, and production scheduling of open-pit mines. In the modeling phase, the volume of the orebody model is required to be filled by the blocks and sub-blocks. The determination of Block Size (BS) is important due to the dependence of the geostatistical issues and calculations related to mining capabilities on it. There are some factors effective in the determination of an optimal BS including the metal content, estimation error, recovery percentage, mining ability, safety, and dilution. In this work, an optimal BS is determined using a two-stage approach. In the proposed approach, the Fuzzy Delphi Analytic Hierarchy Process (FDAHP) and Fuzzy Multi-Objective Optimization by Ratio Analysis (FMOORA) methods are used. In the first phase, the weight of each criterion is calculated based on the opinions of the experts using the FDAHP method. In the second phase, the FMOORA method is applied in order to determine a suitable BS for the design and operation of mining considering the extracted weights in the previous phase. The block model of the Sungun copper mine is studied as a case study to evaluate the capability of the proposed approach. The results of implementation of this approach are desirable because of converting the opinions of the experts to fuzzy values, weighing the experts according to the experience and technical knowledge, weighting the criteria by FDAHP, and choosing the optimal option with FMOORA. Furthermore, the 12.5×12.5×12.5 m3 block (A5) is chosen as an appropriate BS, which is compatible with the real conditions of the studied mine.
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来源期刊
Journal of Mining and Environment
Journal of Mining and Environment MINING & MINERAL PROCESSING-
CiteScore
1.90
自引率
25.00%
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