METHOD FOR CHARGING OF FLOODED WELLS WITH WATER-CONTAINING EXPLOSIVE Russian patent published in 2000 - IPC

FIELD: mining industry. SUBSTANCE: method may be used for charging of wells with water-containing explosives in blasting of ores and rocks, sulfide-containing inclusive, mainly in crumbling and flooded masses. Used as a protective hose is an air-water-permeable hose made of material providing for permeability through 1 sq. dm of its surface of 0.5 to 10.0 l of water/min, pumped into which is water-containing explosive, having a temperature within 60 to 90 C. The hose is made of synthetic woven, wattled or perforated film material, whose temperature limit of use is not lower than the temperature of water-containing explosive, or of natural woven or film material. The protective hose facilitates introduction of the charging hose in it without any breaks and disturbance of continuity of the hose. EFFECT: enhanced productivity and reliability of charge protection against spreading in cracks in the well walls, as well as against wash-out of charge by running water at mechanized charging of water-containing explosive in flooded wells, enhanced safety of work at blasting of sulfide-containing ores and rocks. 5 cl, 9 tbl