Incorporating geo-metallurgical information into mine production scheduling
Küçük Resim Yok
Tarih
2011
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Palgrave Macmillan Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Economic characterization ofmining parcels depends upon geo-metallurgical properties, which vary throughout orebody. Mine production scheduling should aim to obtain maximum utility from orebody in such a way as to ensure mine-mill reconciliation. As heterogeneity of geo-metallurgical variables increases, the scheduling will be a very complicated task. Geo-metallurgical and financial data used in the mine production scheduling are based on simulation and/or estimation generated from sparse drilling and unknown future events. Therefore, the scheduling process involves a significant degree of uncertainty. In order to deal with the uncertainty stemmed from geo-metallurgical and financial variables, two approaches are recommended in this paper. Firstly, mine production scheduling is formulated as a problem of stochastic programming with recourse. The extraction periods of mining blocks are treated as the first-stage variables and the block destinations represents a recourse vector. It is observed that the solution is implicitly robust. Secondly, the scheduling is expressed as a maximin problem to extract more uniform metal quantity in periods to coincide with mill requirements instead of maximization of net present value because the blending constraint in the traditional approach forces more uniform production. In the case where there is correlation between grade and geo-metallurgical variables, this model generates reasonably good results. Journal of the Operational Research Society (2011) 62, 60-68. doi:10.1057/jors.2009.174 Published online 10 February 2010
Açıklama
Anahtar Kelimeler
geo-metallurgical variables, uncertainty, stochastic programming with recourse, mine production scheduling, maximin problem
Kaynak
Journal of The Operational Research Society
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
62
Sayı
1
