A mathematical model for open pit mine production scheduling with Grade Engineering? and stockpiling

• 作者: Karo Fathollahzadeh Elham Mardaneh Mehmet Cigla Mohammad Waqar Ali Asad
• 来源期刊: 矿业科学技术学报（英文版）
• 年，卷（期）: 2021,（4）
• 页码范围: 717-728
• 页数: 12页
• 语种: 英文
• DOI: 10.3969/j.issn.2095-2686.2021.04.016

摘要

This paper presents the development and implementation of an innovative mixed integer programming based mathematical model for an open pit mining operation with Grade Engineering framework. Grade Engineering comprises a range of coarse-separation based pre-processing techniques that separate the desirable (i.e. high-grade) and undesirable (i.e. low-grade or uneconomic) materials and ensure the deliv-ery of only selected quantity of high quality (or high-grade) material to energy, water, and cost-intensive processing plant. The model maximizes the net present value under a range of operational and processing constraints. Given that the proposed model is computationally complex, the authors employ a data pre-processing procedure and then evaluate the performance of the model at several practical instances using computation time, optimality gap, and the net present value as valid measures. In addition, a comparison of the proposed and traditional (without Grade Engineering) models reflects that the proposed model outperforms the traditional formulation.