Multicriteria Analysis for Method Selection in Old Coal Mine Pit Closure in East Kalimantan in Indonesia

Abstract

This research aims to propose the appropriate methodology for closing-down of 8 coal mine pits in East Kalimantan in complying with the mining laws of Indonesia. The Fuzzy Technique for Order of Preference by Similarity to Ideal Solution was employed to evaluate the decision criteria for selecting appropriate methods. In determining the importance weights of each criteria, Voting Analytic Hierarchy Process was used including to prioritize importance weights of the selected experts. The results revealed that 4 out of 8 coal mine pits were suitable for closure with material landfill from surrounding areas using normal operation methods. Two pits were suitable to close with material landfill from another potential mine pit and from the surrounding areas by an alternative mining dozer method, respectively. The rest of the two pits were suitable to close by utilizing the pits for other purposes.