Journal of the Southern African Institute of Mining and Metallurgy
On-line version ISSN 2411-9717
Print version ISSN 0038-223X
BAKHTAVAR, E.; SHAHRIAR, K. and MIRHASSANI, A.. Optimization of the transition from open-pit to underground operation in combined mining using (0-1) integer programming. J. S. Afr. Inst. Min. Metall. [online]. 2012, vol.112, n.12, pp.1059-1064. ISSN 2411-9717.
There are many near-surface deposits with considerable vertical extent that have the potential to be mined by a combined method of open-pit and underground methods. In this regard, there is often a point called 'transition depth' where a decision has to be made whether to continue deepening the pit or change to underground methods. Recently, optimization of the transition from open-pit to underground operation has become an important challenge in mining engineering. Optimally, to model the transition problem on the basis of maximization of the profit from open-pit and underground mining, (0-1) integer programming has been used. In this method, block economic values of open-pit and underground methods should be imported to the transition model. A hypothetical example is presented in order to assess the model in detail.
Keywords : open-pit; underground; transition depth; optimization; (0-1) integer programming; combined mining..