Journal article

Optimum ramp design in open pit mines

JL Yarmuch, M Brazil, H Rubinstein, DA Thomas

Computers & Operations Research | Elsevier | Published : 2020

Abstract

The problem studied in this paper is that of designing the optimal open pit haulage ramp that, for a given ramp width and a maximum ramp gradient, connects two points of the mine, minimising construction and operational costs. Because in-pit ramps require the removal of a considerable amount of non-valuable material (stripping), we discuss two different problems: high stripping (or in-pit) ramp design and low stripping (or ex-pit) road design. For the first situation, we present an integer programming model; in the second case, a shortest path approach is undertaken. In both cases, the models can be solved exactly, and include gradient and curvature constraints. The proposed formulations hav..

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Grants

Awarded by National Commission for Science Research and Technology (CONICYT-Chile), through its program Becas Chile


Awarded by FONDEF


Funding Acknowledgements

We would especially like to thank the anonymous referees who handled this paper for their generous and very useful suggestions. Their insightful comments led to significant improvements in the results presented. Juan L Yarmuch is supported by the Gilbert Rigg scholarship, the National Commission for Science Research and Technology (CONICYT-Chile) grant no. 72160405, through its program Becas Chile, and FONDEF project IT16M10010.