METHOD FOR SEPARATION OF BLOCKS FROM MASS Russian patent published in 1995 - IPC

FIELD: mining and construction. SUBSTANCE: method for separation of blocks from rock mass includes provision of zones of force concentration by dense location of holes along the line of preset splitting. Holes are drilled in block along two intersecting lines of split. Installed in hole are embedded plates. Embedded plate in corner hole located on intersection of split line is installed square to diagonal plane of separated block. Drilled along one line of split are, at least, two first holes, and along the other line, two last holes spaced apart at distance equalling 0.2-0.5 of distance between the other holes. Then, holes are filled with substance expanding during hardening. EFFECT: speeded up separation of blocks from rock mass. 1 dwg