期刊
RESOURCES POLICY
卷 33, 期 4, 页码 222-229出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.resourpol.2008.06.001
关键词
Acid-generating rocks; Cut-off grade policy; Mine design and planning; Porphyry coppers
Cut-off grade is defined as the grade which discriminates between ore and waste within a given orebody. Determination of a complete optimum cut-off grade policy is a very important function during mine life. Using the modified optimum cut-off grade model presented in this paper not only the net present value of a porphyry copper mining project is maximized, but also the adverse environmental impacts of the project are minimized simultaneously. This methodology is more effective in long-range planning. For showing the effectiveness of the model, two scenarios are considered in a hypothetical deposit and the results show that incorporating the modified optimum cut-off grade policy, the net present value will be increased by 3.6% in comparison with the Base Case. (C) 2008 Elsevier Ltd. All rights reserved.
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