1964年年底,保加利亚的梅德特(Medet)采选冶联合企业正式投入生产。該企业位于巴那古里希特附近,包括一个露天开采銅矿場、一个选矿厂和炼銅厂。 預計,从1966年起,該企业将从低品位的銅矿石中,年产純电解銅2500吨左右,使保加利亚的銅年总产量达到45,000吨。該矿体可开采30—35年。矿山設备由苏联設計,大部分由捷克斯洛伐克供应。 At the end of 1964, Medet Mining and Metallurgical Union of Bulgaria was formally put into production. The enterprise is located near Bagan ancient Richter, including an open pit copper mine, a concentrator and a copper smelter. It is estimated that since 1966, the company will produce about 2,500 tons of pure copper annually from low-grade copper ores, bringing the total copper output in Bulgaria to 45,000 tons. The orebody can be mined for 30-35 years. The mining equipment was designed by the Soviet Union, mostly supplied by Czechoslovakia.