Ultimate Pit Limit Optimization Of Opencast Mine Using Surpac Software

Abstract

This study focuses on optimizing the Ultimate Pit Limit (UPL) for opencast limestone mining using SURPAC software. The research aims to demonstrate the advantages of integrating advanced software in the mine planning process, specifically for optimizing pit design and improving resource recovery. By utilizing geological data, including borehole surveys, assay results, and lithological information, a 3D block model was developed, and various optimization algorithms were applied to determine the most economically viable pit boundaries. The study compares traditional manual methods with modern software-based approaches, showcasing the significant reduction in time and error. SURPAC’s integration of Lerchs-Grossmann and other algorithms allowed for more accurate mineable reserve estimation, enhanced safety measures, and improved environmental sustainability by minimizing waste removal and optimizing resource extraction. This research highlights the potential for modern mine planning software to transform the efficiency, safety, and profitability of opencast mining operations.