METHOD FOR FILLING OF BOREHOLES WITH CHARGE COMPONENTS Russian patent published in 2000 - IPC

FIELD: blasting, applicable for filling of boreholes with blasting cartridges of nitroglycerine powders for destruction of rocks at opencast mining. SUBSTANCE: for safe charging of boreholes with powder charges components of flexible coupling provided with hooks and loops at the ends are passed through axial ducts of the blasting cartridges of nitroglycerine powders, the assembly of charge components is alternated with periodic lowering of them in the borehole with a gradual growing of the charge mass to the required value, after that the charge is lowered to the borehole face by means of a winch. To prevent friction of the charge of powder blasting cartridges against the borehole wall, a ring of flexible elastic material exceeding the diameter of the blasting cartridges is placed between the tray and end face of the blasting cartridge. EFFECT: enhanced safety of filling of vertical borehole with blasting cartridges of nitroglycerine powders. 4 dwg