THE COMBINED MINING METHOD OF UNDERGROUND AND OPEN PIT EXPLOITATION OF THE POLYMETALLIC ORE BODY "TENKA" IN MAJDANPEK COPPER MINE

Existing rest parts of the polymetallic ore body Tenka, after finished open pit mining, content the significant amount of very rich polymetallic ore. In accordance with that, we decided to find out whether is possible to mine out this ore using the combined mining method of underground and open pit exploitation. Combined mining method is consisted of open pit technology in the phases of drilling and blasting operations and underground technology in the phases of loading and haulaging the ore to the ground of the terrain. In the paper is presented the basic elements of the technological solution in the both technologies. Such solutions is determined by the mining, geological and geomechanic circumstances and conditions in the Majanpek Copper Mine.