FIELD: mining. SUBSTANCE: when diamond-bearing formations in form of breccias are mined, caving is effected by slices in form of circular truncated cone whose external surface is formed by driving slot from flank wells within thickness of caved slice over formation boundary. In so doing, internal surface of circular truncated cone is formed by installation of casing string in central well. Made from well along upper boundary of each slice is cluster of inclined wells to perform hydraulic fracturing. Additional wells are made inside formation over circumference and installed in additional wells at the level of boundary of each slice are plugs for redistribution of energy of water hammers produced by large fragments of caved slices falling in water. EFFECT: higher efficiency. 2 cl, 4 dwg
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