METHOD FOR LOADING OF FLOODED HOLES Russian patent published in 2000 - IPC

FIELD: mining industry, applicable for loading of holes with explosive at opencast mining of mineral resources. SUBSTANCE: hole is loaded just after its air-flush drilling, lower a hose of polymeric material in the hole, sealing the hose edge in the entrance of the hole by the body of the drum feeder. Air at a pressure exceeding the pressure of ground waters is fed to the hose positioned in the hole, and through the drum feeder explosive is fed to the hose pressed to the hole walls. Along with feeding of explosive the drum feeder serves as a seal for the gas contained in the hole under high pressure. On completion of hole loading the pressure of air fed by the compressor of the drilling rig is reduced to the atmospheric one, and the charge is tamped into the hole. EFFECT: simplified procedure of loading of flooded holes, reduced cost. 1 dwg