SPACER TAMPING BAR Russian patent published in 2006 - IPC F42D1/08 

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

SUBSTANCE: the spacer tamping bar represents a cylinder with a tapered expansion composed at least of three parts that can move in the horizontal direction on fingers fastened above and inserted in the guide bushes on the bottom. The split cylinder is connected in the upper part to a supporting ring through a spacer tube, and a hollow spacer cone is inserted in the inner cavity of the split cylinder, the cone is provided with a tubular haulage with a thread of the upper end, freely passing through the holes in the cylinder bottom and supporting ring.

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