Lexicographic goal programming approach for a short-term mining planning problem.
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Date
2023
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Abstract
This article addresses a short-term mining planning problem. There are four
objectives to be minimized: the deviations in grades and ore proportion in
particle size ranges of the plant goals, the deviation in the waste mass to
achieve the stripping rate, and the number of truck trips between mining
fronts and discharges. The problem was solved through the lexicograph-
ical goal programming (LGP) method, which generates solutions that can
guarantee a more comprehensive analysis of the decision-making process.
The LGP method was tested by using several scenarios of a Brazilian mining
company. These scenarios differ in the number of excavators and the toler-
ances concerning meeting the plants’ ore grades. In the results, the impact
on the values of the other objectives is analysed of varying the number of
excavators and the tolerances in the plants’ grade targets.
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Keywords
Open-pit mining, Grade and size ranges, Mixed-integer linear programming
Citation
MARTINS, A. G.; SOUZA, M. J. F. Lexicographic goal programming approach for a short-term mining planning problem. Engineering Optimization, v. 55, n. 2, p. 329-343, 2023. Disponível em: <https://www.tandfonline.com/doi/full/10.1080/0305215X.2021.2004135>. Acesso em: 06 jul. 2023.