METHOD FOR PROTECTION FROM AIR-BLAST BY TEMPORARY ROCK WALL Russian patent published in 2004 - IPC

FIELD: mining industry.

SUBSTANCE: method includes construction of temporary rock wall in mine in front of protected space by means of driving paired ascending fans and charging them with blast-hole charges. Then the latter are detonated in order from paired ascending fans ends to the center. In mine ceiling in front of protected space and after last paired ascending fan a shelf reinforced with anchors is made, and before first paired ascending fan a pit is mounted covered by a plate with an explosive charge placed under it along perimeter, volume of said pit being equal or greater than projected volume of destructed rock of temporary wall. Detonation of blast-hole charges is performed on signal from sensor placed at distance in front of protected space, generated when calculated air-blast passes by. After protection from air-blast the pit is opened by detonation of charge below pit plate and destruction of plate, and rock wall is put into the pit.

EFFECT: possible instant forming of protective highly efficient temporary rock wall, minimal energy and time costs of mine practicability.

3 cl, 8 dwg