METHOD FOR CHARGING OF HOLES Russian patent published in 2001 - IPC

FIELD: mining art, in particular, methods for charging of holes at blasting. SUBSTANCE: hole is filled with charges of explosives or powders in the condition of a free fall of charges. To prevent friction of charges against the hole walls, the surface of the charges against the hole walls, the surface of the charges is screened by inert materials - drilling slime, drilling dust, sand. Paper tapes are fastened on the surface of the charges by a scotch tape with formation of a funnel that is filled with inert material forming solid rings around the charge or origin protrusions on the diametrically opposite points of the charge, forming a contour with a diameter exceeding the charge, but less than the diameter of the hole, around the charge. For absorbing the impacts placed at the ends of the dropped charges are packs of film materials filled with liquid or gas. EFFECT: enhanced safety of charging of vertical holes with explosive charges and powders, carried out by the simplest method without any use of mechanisms and power sources. 5 cl, 4 dwg