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- W3143428162 abstract "The mineral supply chain in an ideal open-pit mining operation constitutes a set of sequential stages including a surface mine or an open-pit, a processing plant and a refinery or market. Cut-off grade defines the flow of materials from the mine to subsequent stages within this mineral supply chain. This underlines the significance of cut-off grades in establishing the economic viability of an operation. However, only heuristic methods are available for defining the cut-off grade policy for complex mineral resources (orebodies) that constitute multiple economic minerals. This article proposes a new mixed integer programming based mathematical model that generates an optimal cut-off grade policy for open-pit mining operations that mine, process and refine or market multiple metal products. An implementation of the new method in three separate case studies reflects better performance (i.e., 24%, 36% and 27% higher net present value) against available heuristics." @default.
- W3143428162 created "2021-04-13" @default.
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- W3143428162 date "2021-08-01" @default.
- W3143428162 modified "2023-10-05" @default.
- W3143428162 title "A mixed integer programming based cut-off grade model for open-pit mining of complex poly-metallic resources" @default.
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- W3143428162 doi "https://doi.org/10.1016/j.resourpol.2021.102076" @default.
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