Multi-Objective Ore Blending Optimization for Polymetallic Open-Pit Mines Based on Improved Matter-Element Extension Model and NSGA-II

Jun Xiang, Jianhong Chen, Aishu Zhang, Xing Zhao, Shengyuan Zhuo and Shan Yang ()
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Jun Xiang: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Jianhong Chen: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Aishu Zhang: Guangdong Province Dabaoshan Mining Co., Ltd., Shaoguan 512127, China
Xing Zhao: Guangdong Province Dabaoshan Mining Co., Ltd., Shaoguan 512127, China
Shengyuan Zhuo: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Shan Yang: School of Resources and Safety Engineering, Central South University, Changsha 410083, China

Mathematics, 2025, vol. 13, issue 11, 1-17

Abstract: With the increasing demand for mineral resources, sustainable mining development faces challenges such as low resource utilization efficiency. Ore blending optimization has emerged as a critical approach to enhance resource utilization. This study constructs a multi-objective ore blending optimization system for complex polymetallic open-pit mines based on the improved matter-element extension model and NSGA-II algorithm. By identifying key blending factors, objective functions are established to minimize both total ore quantity deviation and grade deviation, with six constraints defined to reflect production capacity limits. The NSGA-II algorithm is employed to solve the multi-objective optimization problem, generating a Pareto optimal solution set from which the optimal ore blending scheme is selected using the improved matter-element extension model. A case verification at Dabaoshan Mine demonstrates that the model-verified scheme achieves 1.035% higher total production accuracy than the planned value and 2.828% higher than actual production, while improving Cu grade deviation accuracy by 7.021% over the plan and 1.064% over actual production, and S grade deviation accuracy by 33.027% over the plan and 3.127% over actual production. This study, through the construction of systematic ore blending theory and empirical analysis, provides an important theoretical framework and methodological support for subsequent research on ore blending in polymetallic open-pit mines. It demonstrates significant practical application value in Dabaoshan Mine, offering an intelligent mine solution that combines scientific rationality and engineering practicability for polymetallic open-pit mines.

Keywords: polymetallic open-pit mine; ore blending optimization; NSGA-II; improved matter-element extension model (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2025
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