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The paper proposes a problem-solving approach in the area of underground mining, related to the evaluation and selection of the optimal mining method, employing fuzzy multiple-criteria optimization. The application of fuzzy logic to decision-making in multiple-criteria optimization is particularly useful in cases where not enough information is available about a given system, and where expert knowledge and experience are an important aspect. With a straightforward objective, multiple-criteria decision-making is used to rank various mining methods relative to a set of criteria and to select the optimal solution. The considered mining methods represent possible alternatives. In addition, various criteria and subcriteria that influence the selection of the best available solution are defined and analyzed. The final decision concerning the selection of the optimal mining method is made based on mathematical optimization calculations. The paper demonstrates the proposed approach as applied in a case study.

Present company Trepca-Sever is formed by foreigners after the bombing of Serbia and Montenegro in 1999, and it is a part of former Trepca Conglomerate located in northern part of Kosovo and Metohija, namely in three municipalities: North Kosovska Mitrovica, Zvecan and Leposavic. Main office of Trepca Conglomerate was always in Zvecan, flotation of lead-zinc ore (in the period of 1930-1985), lead smelting and refining plants (founded in 1939), laboratory, Institute, electromechanical workshops and other ancillary services. In Leposavic flotation, ores of Kopaonik mines are processed, while financial and commercial services are located in the North Kosovska Mitrovica.