METHOD FOR DRIVING UNDERGROUND WORKING CLOSE TO OUTBURST-RISKY ROCK MASS

摘要

FIELD: mining industry. SUBSTANCE: according to method, drilled in work face are blast-holes of cutting, auxiliary, and contouring type. Blast-holes are filled with explosive charges which are fired successively. Fired first in work face are contouring blast-holes in zone of realizing gas-dynamic occurrences of dangerous outbursts in rock mass. Created is screening contouring zone of fissuring from side of rock mass. Fired simultaneously with contouring blast-holes are cutting blast-holes. EFFECT: high efficiency. 1 dwg