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Application of Present Value-Volume (PV-V) and NPV-Cumulative Total Ore (NPV-CTO) fractal modelling for mining strategy selection

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  • Yasrebi, Amir Bijan
  • Hezarkhani, Ardeshir
  • Afzal, Peyman

Abstract

Open pit mine planning and determination of mining orientation are a critically important part of a mine opening to its closure. However, an optimal extraction sequences (OES) is identified when an NPV cumulative trend becomes steady. This is controlled manually, typically from a nested pit shell methodology based on the experience which can lead to suboptimal results. Given this problem, a mathematical method to provide an analytical practice, which intends to prevent manual identification of an OES seems to be inevitable. The aim of this study is to propose Present Value-Volume (PV-V) and NPV-Cumulative Total Ore (NPV-CTO) fractal models to identify an accurate excavation orientation as well as an OES with respect to economic principals and ore grades. This has been conducted to achieve an earlier pay-back period and highest cumulative NPV in Kahang Cu-Mo porphyry deposit, central Iran. Results derived via the PV-V fractal modelling indicate an accurate mining orientation with an N-S trend. Thus, pit sequence No. 92 was selected as the closure of the open pit mining for the Kahang deposit. Consequently, the NPV-CTO fractal model provides an analytical tool which can be used for determination of an OES for an open pit mine.

Suggested Citation

  • Yasrebi, Amir Bijan & Hezarkhani, Ardeshir & Afzal, Peyman, 2017. "Application of Present Value-Volume (PV-V) and NPV-Cumulative Total Ore (NPV-CTO) fractal modelling for mining strategy selection," Resources Policy, Elsevier, vol. 53(C), pages 384-393.
    • Handle: RePEc:eee:jrpoli:v:53:y:2017:i:c:p:384-393
    DOI: 10.1016/j.resourpol.2017.07.011
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    References listed on IDEAS

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    2. Menezes, Gustavo Campos & dos Santos Corrêa, Juliano, 2022. "Model and algorithms applied to Short-Term Integrated Programming Problem in Mines," Resources Policy, Elsevier, vol. 79(C).

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