Optimizing the number of open pit mine push backs

Mohammad Rezaee, M. Osanloo, R. Q. Honaker

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Push backs used in the production planning of open pit mines play an integral role in generating annual cash flow. Although several algorithms for push back designs have been proposed, none have studied the optimum number of push backs. In this paper, different algorithms have been implemented for the push back design of a cross section of a copper deposit and the results discussed. Moreover, the optimum number of push backs has been determined using analytical and multiple attribute decision making (MADM) methods based on minimizing the risk associated with grade uncertainty, and minimizing stripping ratio, while maximizing net present value (NPV). According to the findings, the optimum number of push backs has been proposed to be between three and six, as lower quantities of push backs are more likely to achieve the calculated net present value, and have smoother stripping ratios for different pushbacks. This approach was examined in an operating mine and the optimum number of push backs determined to be four.

Original languageEnglish (US)
Title of host publication2012 SME Annual Meeting and Exhibit 2012, SME 2012, Meeting Preprints
Pages687-694
Number of pages8
StatePublished - Sep 14 2012
Event2012 SME Annual Meeting and Exhibit 2012, SME 2012 - Seattle, WA, United States
Duration: Feb 19 2012Feb 22 2012

Publication series

Name2012 SME Annual Meeting and Exhibit 2012, SME 2012, Meeting Preprints

Other

Other2012 SME Annual Meeting and Exhibit 2012, SME 2012
CountryUnited States
CitySeattle, WA
Period2/19/122/22/12

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All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology
  • Geology
  • Geotechnical Engineering and Engineering Geology

Cite this

Rezaee, M., Osanloo, M., & Honaker, R. Q. (2012). Optimizing the number of open pit mine push backs. In 2012 SME Annual Meeting and Exhibit 2012, SME 2012, Meeting Preprints (pp. 687-694). (2012 SME Annual Meeting and Exhibit 2012, SME 2012, Meeting Preprints).