Pseudoflow Method for Pit Optimization in Mining

This white paper presents the pseudoflow method for pit optimization implemented in GEOVIA Whittle, which is based on a mathematical algorithm that enhances time efficiency compared to the traditional Lerchs-Grossmann (LG) method. The paper outlines the historical context of pit optimization algorithms, detailing the evolution from LG to more efficient alternatives, including the pseudoflow algorithm. It explains the mathematical concepts underlying the pseudoflow method, focusing on graph theory and the optimization of block dependencies in mining. The document also discusses the maximum closure problem and how it relates to the maximum flow method, providing a comprehensive understanding of how these concepts are applied to achieve optimal pit configurations. Additionally, the paper addresses the challenges faced by strategic mine planners in adopting new methodologies and presents a comparative analysis of the performance improvements offered by the pseudoflow algorithm over traditional methods. Overall, the document serves as a technical guide for understanding and implementing advanced pit optimization techniques in mining operations.