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E b a Z _ l Z" k h l d j b l ^ h b \ g Z \ t e b s Z UNDERGROUND MINING OF PROFILE MINERAL RESERVES OF AN OPENCAST MINE OF CONCESSION AREA Krustyo Dermendjiev 1, Georgy Stojanchev 2 \ T ^ _ ` W T c Z l _ S ^S m nS X \ T U j S T d Y S a o i T a R Z p g q W U U d rU d sY X X rS W U T V S Y d S Z t u v u w xy z u { } { u v ~ } u u ~ yH C G B P e _ d k Z g ^ t j F H R ? Czechia Languages Familysearch ƒTƒ‚ƒGƒh ŽqŒ¢ ‚©‚í‚¢‚¢