1. Model of room and pillar production planning in small scale underground mines with metal price and operating cost uncertainty
- Author
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Zoran Gligorić, Ines Grozdanović, Aleksandar Ganić, Aleksandar Milutinovic, Bojan Dimitrijević, Zoran Gojkovic, and Miloš Gligorić
- Subjects
Rate of return ,Economics and Econometrics ,Geometric Brownian motion ,Sociology and Political Science ,Operations research ,Computer science ,020209 energy ,Process (computing) ,Underground mining (hard rock) ,02 engineering and technology ,010501 environmental sciences ,Management, Monitoring, Policy and Law ,Room and pillar mining ,01 natural sciences ,Production planning ,0202 electrical engineering, electronic engineering, information engineering ,Mean reversion ,Law ,Operating cost ,0105 earth and related environmental sciences - Abstract
Meeting investment and operating goals with presence of different sources of uncertainties and operational constraints is critical for a successful underground mining operation and even for a mining company to survive. Small and large mining businesses are all affected by business environment. Production planning that takes into account real strength of the mining company requires from the owner or management of the company to set up acceptable and achievable investment goals (targets). In this paper we propose the production planning model that minimizes deviation from Acceptable Rate Of Return (AROR). Besides the AROR, there are operating goals success that should be also realized with minimum deviation from target values. Accordingly, the production planning can be treated as a multi-objective problem. All these objectives are integrated in multi-variable weighted Frobenius distance function that measures the deviation from established targets. Ore body is represented as a set of mineable blocks and room and pillar mining method is selected as a way of mining. We apply a multi-objective iterated greedy algorithm to define a set of blocks that should be mined every year such that deviations from target values are less than or equal to given errors of minimization. Uncertainty of metal price and operating costs are treated by mean reversion process and Geometric Brownian motion respectively. Algorithm was tested on small hypothetical lead-zinc ore body.
- Published
- 2020
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