Abstract

CETIN, E.  and  DOWD, P.A.. Multiple cut-off grade optimization by genetic algorithms and comparison with grid search method and dynamic programming. J. S. Afr. Inst. Min. Metall. [online]. 2016, vol.116, n.7, pp.681-688. ISSN 2411-9717.  http://dx.doi.org/10.17159/2411-9717/2016/v116n7a10.

Optimization of cut-off grades is a fundamental issue for mineral deposits. Determination of optimum cut-off grades, instead of application of a static cut-off grade for the life of a mine, maximizes the net present value. The authors describe the general problem of cut-off grade optimization for multi-mineral deposits and outline the use of genetic algorithms, the grid search method, and dynamic programming for optimal cut-off grade schedules for deposits with up to three constituent minerals. The methods are compared by assessing the results of the implications involved in using them.

Keywords : cut-off grade; sequencing; optimization; multi-mineral deposit; genetic algorithms.

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