A mathematical programming model for optimal cut-off grade policy in open pit mining operations with multiple processing streams

• Published in: International journal of mining, reclamation and environment Vol. 34; no. 3; pp. 149 - 158
• Main Authors: Khan, Asif, Asad, Mohammad Waqar Ali
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 15.03.2020; Taylor & Francis Ltd
• Subjects: Cut off grades; cut-off grade; Integer programming; Linear programming; Mathematical programming; Mineralization; Mining; Mining industry; Mixed integer; mixed integer linear programming; modelling; Open pit mining; optimisation; Quality; Schedules; Streams; Waste materials

Cut-off grade classifies the available supply of ore (valuable) and waste material within a mineralised deposit. Given the mining, processing and refining limitations of a mining operation, an optimal cut-off grade policy ensures that the flow of ore from the mine to the processing and refining faci...