Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/2045
Appears in Collections:Management, Work and Organisation Journal Articles
Peer Review Status: Refereed
Title: Transition from open-pit to underground as a new optimization challenge in mining engineering
Authors: Bakhtavar, Ezzeddin
Shahriar, Kourosh
Oraee, Kazem
Contact Email: s.k.oraee-mirzamani@stir.ac.uk
Keywords: Transition depth
optimization challenge
open-pit
underground
discount rate
NPV
Issue Date: Sep-2009
Publisher: Springer
Citation: Bakhtavar E, Shahriar K & Oraee K (2009) Transition from open-pit to underground as a new optimization challenge in mining engineering, Journal of Mining Science, 45 (5), pp. 485-494.
Abstract: There are many deposits that have the potential to be mined by a combined method of open-pit and underground. In this manner, the most sensitive problem is the determination of the optimal transition depth from open-pit to underground or vice versa. To calculate this depth, a model based on block economic values of open-pit and underground methods together with the Net Present Value (NPV) attained through mining is first presented. During the model, NPV of open-pit is compared to the value of underground for the similar levels. A hypothetical example is used in order to analyze the model in detail. Based on the assumptions made such as: a discount rate of 15 %, each pair of contiguous level-cuts have to mine during one year, and one level as the height of crown pillar, the optimal transition depth was determined to be equal to 62.5 m. Then, level 6 was considered as the suitable crown pillar. Finally, maximum total NPV of the combined mining was calculated to be 25.54 units of currency
Type: Journal Article
URI: http://hdl.handle.net/1893/2045
DOI Link: http://dx.doi.org/10.1007/s10913-009-0060-3
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author; you can only request a copy if you wish to use this work for your own research or private study.
Affiliation: Urmia University of Technology
Amirkabir University of Technology
Management Work and Organisation

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