Concurrent optimization of mine block sequencing and cut-off grades
Küçük Resim Yok
Tarih
2011
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Korza Matbaacilik
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Mine block sequencing, ore-waste discrimination and determination of production rates are main sub-problems of mine production scheduling. The objective is to maximize net present value under access and capacity constraints. The problems are currently solved in a sequential way: First, production rates and corresponding costs are initiated. Using this cost structure, a cut-off schedule is determined. Finally, the block sequencing is executed for marginal cut-off grades and pre-defined production rates. This process is repeated until maximum net present value (NPV) is found. However, these problems should be solved simultaneously instead of iterative procedure because production rates and cut-offs cannot be known without block sequencing. In this paper, ore-waste discrimination and block sequencing are optimized concurrently through mixed integer programming (MIP) model. This procedure also considers relationship between capacities and accessibility. To observe the performance of new model, a case study is implemented. An increase in NPV is observed.
Açıklama
22nd International Mining Congress and Exhibition of Turkey, IMCET 2011 -- 11 May 2011 through 13 May 2011 -- 110210
Anahtar Kelimeler
Production control, Scheduling, Capacity constraints, Cost structure, Cut-off grade, Mine production, Mixed integer programming model, Net present value, Production rates, Sub-problems, Integer programming
Kaynak
IMCET 2011 - Proceedings of the 22nd International Mining Congress of Turkey
WoS Q Değeri
Scopus Q Değeri
N/A
