HOLE CHARGING METHOD Russian patent published in 2017 - IPC F42D1/08 

FIELD: mining.

SUBSTANCE: charging method involves placing a charge of an explosive and detonating agent in the hole, sending the connected knot of the wedge-retainer with a knife and fixing it with a sharp jolt in the hole. The arrangement of the wedge-retainer device in the hole is carried out by a wedge to the explosive substance and a by a retainer to the hole collar. Wedge-retainer is made of plastic. The wedge-retainer includes a retainer with sliding cylindrical cheeks and an interacting wedge made with a cylindrical base. Grooves for electric wires are formed on the outer surface of the cylindrical cheeks and the cylindrical base of the wedge. On the wedge the ribs are made, and on the retainer the toothed projections are performed, by means of which the wedge is fixed with a retainer. The edges of the wedge are located longitudinally on the transverse shelves of the wedge from the outside, and the toothed projections of the retainer are performed on the sliding cheeks of the retainer inner part.

EFFECT: invention provides a resistance of fixing the wedge-retainer general construction in a contaminated hole and allows to warn the shooter about fixing the product in the hole in difficult working conditions.

8 cl, 8 dwg