METHOD FOR PREVENTION OF ROCK BURSTS IN ROCKS OF MINE SOIL Russian patent published in 2010 - IPC E21F5/00 F42D1/08 

FIELD: mining.

SUBSTANCE: invention is related to mining industry for maximum unloading of mine soil rocks, which are inclined to dynamic destructions. Method for prevention of rock bursts in rocks of mine soils, including drilling of wells into layer of hard rock, their charging and explosion of explosive charges. In lower part of layer, wells are charged with more powerful charges and exploded in tillage mode, and in upper part pf layer wells are charged with reduced charges, and controlled blasting is carried out. Wells in upper part of hard rock layer are charged in a row. Wells are arranged in rows symmetrically versus longitudinal axis of mine. Wells are drilled pairwise at the angle to mine soil in plane of mine cross section. Wells are drilled pairwise at the angle versus mine soil in planes arranged at the angle to plane of its cross section. Wells are drilled in such a manner so that they cross vertical plane, passing through longitudinal axis of mine, at the height of 0.15-0.25 m from lower limit of hard rock layer, where m is layer strength.

EFFECT: invention provides for increased efficiency of dynamic events prevention in mine soil and safety of mining works execution due to differential softening of some parts of hard rock layer, which lies near mine soil.

5 cl, 3 dwg