Aggregation heuristic for the open-pit block scheduling problem

Enrique Jélvez, Nelson Morales, Pierre Nancel-Penard, Juan Peypouquet and Patricio Reyes

European Journal of Operational Research, 2016, vol. 249, issue 3, 1169-1177

Abstract: In order to establish a production plan, an open-pit mine is partitioned into a three-dimensional array of blocks. The order in which blocks are extracted and processed has a dramatic impact on the economic value of the exploitation. Since realistic models have millions of blocks and constraints, the combinatorial optimization problem of finding the extraction sequence that maximizes the profit is computationally intractable. In this work, we present a procedure, based on innovative aggregation and disaggregation heuristics, that allows us to get feasible and nearly optimal solutions. The method was tested on the public reference library MineLib and improved the best known results in the literature in 9 of the 11 instances of the library. Moreover, the overall procedure is very scalable, which makes it a promising tool for large size problems.

Keywords: Mine planning; Block aggregation; Open-pit block scheduling; Integer programming; Heuristics (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (15)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:ejores:v:249:y:2016:i:3:p:1169-1177

DOI: 10.1016/j.ejor.2015.10.044

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