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“ . ”, 52, . II, , 2009 ANNUAL OF THE UNIVERSITY OF MINING AND GEOLOGY “ST. IVAN RILSKI”, Vol. 52, Part I, Mining and Mineral processing, 2009
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1 “ ”, 1700 , e-mail:: [email protected] 2 “ ”, 1700 , e-mail:: [email protected]
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UNDERGROUND MINING OF PROFILE MINERAL RESERVES OF AN OPENCAST MINE OF CONCESSION AREA Krustyo Dermendjiev 1, Georgy Stojanchev 2 1 University of Mining and Geology “St. Ivan Rilski“, 1700 Sofia, e-mail: [email protected] 2 University of Mining and Geology “St’ Ivan Rilski“, 1700 Sofia, e-mail: [email protected] ABSTRACT. In the many cases the combined production is rational and effective when underground mining of profile mineral reserves takes place. The paper presents one optional project decision for underground mining of profile area of “ St. Elizabeth” opencast coal mine after clearly formulated investor`s requirements.
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