METHOD FOR TREATING DOUBLE LEVELS WHEN EXTRACTING MASSIVE ORE DEPOSITS Russian patent published in 2004 - IPC

FIELD: mining industry.

SUBSTANCE: method includes cutting of ore body on levels and blocks, driving of cutting slits by means of exploding deep wells for cutting raises and of preparatory cutting mines, ore cutting and transferring of cut ore of upper level through cutting slits of lower level, in which cutting slits of cut blocks of lower level are placed with displacement relatively to cutting slits of cut blocks of upper level. Raise mines of lower level are placed with capability for transferring rock during preparation of raises and cutting slits of upper level. Raises of upper level are displaced relatively to raises of lower level for a value equal to small half-axis of ellipsoid of ore outlet in vertical plane and in horizontal plane for a value equal to small axis of outlet ellipsoid. Number of raises in block is determined as ration of ore body massiveness to value of small half-axis of ore outlet ellipsoid.

EFFECT: better quality of ore massive cutting.

3 dwg