THE SELECTION OF OPTIMAL CONTOUR OF OPEN PIT "DELICI" NEAR UGLJEVIK

Abstract

In this article are presented the procedures and the results of open pit optimal contour "Delici" choice near Ugljevik, Republic of Srpska. By using of LG 3D algorithm for optimization in the Whittle Four-X^TM is determined a series of open pit shales based on the various income factors (Revenue factor) with iteration of 0.03 of change in coal prices according to the base price of 2.2 €/GJ. For each contour were calculated the cash flows, and the optimal contour of open pit was determined based on the maximum value of NPV (net present value). The access ramps, transport roads, geometric elements of benches, final slopes and calculations of the exploitation coal reserves were done inside of the optimal open pit contour. After determing of optimal open pit contour it was defined the mine plan, dynamics of exploitation and choice of waste disposal location.