Stochastic strategic planning of open-pit mines with ore selectivity recourse. Issue 1 (2nd January 2018)

• Record Type: Journal Article
• Authors: Navarra, A.; Montiel, L.; Dimitrakopoulos, R.
• Is Part Of: International journal of mining, reclamation and environment. Volume 32:Issue 1(2018)
• Page Start: 1
• Page End: 17
• Publication Date: 2018-01-02
• Subjects: Strategic mine planning -- open-pit -- stochastic optimisation -- variable neighbourhood descent; Mining engineering -- Periodicals; Mineral industries -- Environmental aspects -- Periodicals; Abandoned mined lands reclamation -- Periodicals; 622.292
• DOI: 10.1080/17480930.2016.1201380
• Languages: English
• ISSNs: 1748-0930

Abstract

Abstract: Stochastic mine planning algorithms have been extended to better represent ore selection decisions. Under geological uncertainty, existing algorithms generate plans that may violate the mineral processing capacity; under such geological scenarios, the excess ore undergoes a recourse action which is not as profitable as regular processing, hence decreasing the net present value. This decrease has previously been represented as a penalty on excess ore, which may not accurately represent actual operations. The new framework considers the most typical recourse: increasing the cut-off grade into the mineral process. This approach is demonstrated by adapting the VND algorithm of Lamghari et al.