A review of cut-off grade policy models for open pit mining operations
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© 2016 Elsevier Ltd. In an open pit mining operation, the heterogeneity of the grade-tonnage distribution of the deposit dictates that all available material within the boundaries of an open pit may not be processed. Given this heterogeneity, it is imperative that the valuable (ore) and waste materials are clearly identified. In this context, the cut-off grade defines the quantity of ore and waste, ensuring smooth supply of ore to the processing streams. While, the earliest significant effort towards the development of models for cut-off grade policy dates back to 1960s, a number of contributions on this vital aspect of a mining operation have been made since then. This paper presents a comprehensive overview of the available literature on cut-off grade policy models and suggests possible areas of future research.
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Asad, M.; Topal, Erkan (2011)The optimum cut-off grade policy maximizes the net present value (NPV) of an open pit mining operation subject to the mining, processing, and refining capacity constraints. The traditional approaches to cut-off grade ...
Khan, A.; Asad, Mohammad Waqar (2019)Cut-off grade controls the movement of materials among mining, processing and refining stages of an open pit mining operation. The cut-off grade policy constitutes a schedule of cut-off grades and the associated quantities ...
Optimal production scale of open pit mining operations with uncertain metal supply and long-term stockpilesAsad, Mohammad Waqar; Dimitrakopoulos, R. (2012)An open pit mining operation consists of various stages, and the calculation of the production capacities of these stages depends upon the available supply of ore (mineralized material of economic value) and waste material. ...