Recoverable reserves and support effects when optimizing open pit mine designs

Farrelly, Chris T. and Dimitrakopoulos, Roussos (2002) Recoverable reserves and support effects when optimizing open pit mine designs. International Journal of Surface Mining, Reclamation and Environment, 16 3: 217-229. doi:10.1076/ijsm.16.3.217.7424


Author Farrelly, Chris T.
Dimitrakopoulos, Roussos
Title Recoverable reserves and support effects when optimizing open pit mine designs
Journal name International Journal of Surface Mining, Reclamation and Environment   Check publisher's open access policy
ISSN 1389-5265
1748-0949
Publication date 2002-09-01
Sub-type Article (original research)
DOI 10.1076/ijsm.16.3.217.7424
Volume 16
Issue 3
Start page 217
End page 229
Total pages 13
Editor R. K. Singhai
D. H. Graves
et al.
Place of publication Lisse, The Netherlands
Publisher Swets & Zeitlinger
Language eng
Abstract Orebody modelling, support effects and the estimation of recoverable reserves are key parts of open pit optimization studies. A case study is presented on the estimation of recoverable reserves using an implementation of indicator kriging where metal quantity is used to select cutoffs, and support corrections founded on a conditional simulation approach. Mining selectivity is explored in the subsequent optimization study to compare results from indicator kriging of grade estimates on a regular size blocks and indicator kriging estimates on small size blocks. The use of indicator kriging models adjusted for a given selectivity and the use of grade proportions in each block for the optimization study, provide a presentation of the expected ore recovery for a predefined level of selectivity. The case study shows that indicator kriging estimation with full accounting of block grade distributions generates substantially better results in the pit optimization study. In addition, the adverse effects of small blocks and over-smoothing on optimization results are illustrated.
Keyword Geostatistics
Mine planning
Optimization
Recoverable reserves
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mechanical & Mining Engineering Publications
 
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Created: Wed, 15 Aug 2007, 04:34:16 EST