SUSPENDED TAMPING BAR OF BLAST HOLES Russian patent published in 2006 - IPC F42D1/08 

FIELD: drilling and blasting operations in hard rocks, applicable in various branches using blasting operations in hard rock masses.

SUBSTANCE: the suspended tamping bar of blast holes represents a split cylinder with at least three longitudinal slots and a tapered expansion of the cavity down from the bottom with a collet grip fastened through the center of its outer surface. A hollow spacer cone is inserted from the bottom into the split cylinder, the cone is connected to a rope haulage which passes through the collet grip, and with the upper end through a shackle with holes it is fastened an a lever installed on a bedplate. The rope haulage passes through the spacer tube fastened on the bedplate from the bottom.

EFFECT: provided locking of blast products in the charge cavity before destruction of the mass, enhanced efficiency of use of the blast energy for crushing of the rock.

2 dwg