Prioritisation of Environmental Improvement Projects in Deep-Level Mine Ventilation Systems

Abstract Deep-level underground mining costs in South Africa are continuously rising due to the increased depth at which gold is being mined, resulting a rise virgin rock temperature and an increase cooling requirements. Therefore, mines must evaluate various ventilation optimisation projects required be implemented throughout their life of mine (LOM). This study develops method identify prioritise large capital expenditure (CAPEX) environmental improvement projects, improve thermal comfort underground. The solution presents ‘multi-criteria decision-making’ (MCDM) process, incorporating ‘analytic hierarchy process’ (AHP) ‘technique for order performance by similarity ideal solution’ (TOPSIS) into provide scientific decision-making. These evaluated based on four criteria, namely project risk, impact comfort, cost, implementation time. study’s uses simulations determine environment. identification evaluation best suit current economic climate, while improving conditions decreasing safety risk essential aspect developed this study. was mechanised deep-level showed that surface refrigeration most suitable alternative, case as validation solution. proves MCDM adequate incorporate subjective criteria decision-making structured approach making significant complex decisions.