Multi-criteria decision making is widely used in mining to solve a variety of problems, as well as to support the mine planning and design process. The choice of the mining method of excavation for underground exploitation is a very complex and responsible matter, and support in the application of multi-criteria decision-making methods are of great importance of making the final decision. This paper will present the scientific methodology for the mining method selection by the application of VIKOR method, which gives the results of compromise alternatives.

The total operating costs of each mine largely depend on the method of mining. Therefore, the appropriate choice of the method of mining excavation is very important and great attention is paid to this issue. There are several procedures for the selection of the mining method, among which the most important and most commonly used numerical method is the UBC methodology for the selection of the mining method. According to this methodology, the choice of the method of mining excavation is based on the mining-geological parameters of the ore and adjacent rocks. In this paper, the UBC methodology for the selection of the mining excavation method for a specific case will be applied. According to this methodology, it was obtained that Cut and Fill method is best ranked for specific conditions and the most appropriate way of mining.

COST ANALYSIS IN CONSTRUCTION OF UNDERGROUND MINING STRUCTURES AND OPPORTUNITIES FOR THEIR REDUCTION

Ore recovery and ore dilution have an important role for efficient operation of a mine. With each increase in percentage of ore dilution and reduced ore recovery there is negative impact on the economic value of the ore reserves. These parameters are mainly controlled with quality mining project and in situ analysis. The primary goal of this science paper is to present the methodology for optimization of coefficient for ore recovery and ore dilution in sublevel caving mining method. The optimization will be carried out through economic parameters, ie by calculating the net present value (NPV).

Exactly established longitudinal profile, as well as physical - mechanical properties of all lithological units along the route of a mining facility are very important for the design of an underground mining facilities. This paper presents the construction of ramp in an underground mine in Macedonia, where real and projected supporting operating supplies are compared.

The method of excavation tunnels, as infernal object depends primarily on the rock mass along the tunnel route, as well as rock mass in the nearby environment of the route. This paper presents a methodology for determining the drilling - blasting parameters in one of the various zones along the route of the tunnel. Furthermore, proposed here are the construction of a tunnel in three sections, pattern of the boreholes at the face, as well as the construction charged cut holes, auxiliary and contour blasting holes.