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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.

During blasting operations, the potential energy of explosive materials is transformed into a mechanical work. That energy, in the vicinity of blasting location, destructs and crushes rock mass, a bit further creates cracks and permanent deformations in the rock mass, and even further it is being transformed into elastic deformations. The effect of elastic seismic wave is movement of particles of the rock mass from its equilibrium position. Such oscillation of the rock mass particles is manifested as a shock and represents one of the negative effects of blasting. In order both to evaluate and control the seismic effect of blasting, as well as to plan it, the determination of soil oscillation law is required, with the strike: mine field - facilities to be protected. One of the most commonly used equations is that of M. A. Sadovski defining the law of alteration in the oscillation velocity of the soil depending on the distance, the explosive amount, and conditions of blasting and geologic characteristics of the soil, being determined on the basis of test blasting for the specific work environment. In this paper, an analysis of the method for the determination of soil oscillation law parameters has been conducted, suggested by Professor M. A. Sadovski. The applicability of this law was analyzed on examples of mass blasting in the 'Nepričava' Open Pit Mine being carried out in order to exploit the deposit. To determine parameters in the equation of Sadovski, in addition to the common method of least squares, another model was applied. Thereby, it has been stated that both models can be used to calculate the oscillation velocity of the rock mass.

M20 M24