SPACER TAMPING BAR 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 spacer tamping bar represents a split cylinder with at least three longitudinal slots and a tapered expansion of the cavity down from the bottom, which is connected to the supporting ring through a spacer tube. A hollow spacer plug is inserted in the split cylinder from the bottom, it consists of tapered and cylindrical parts with at least three longitudinal slots, provided with a tubular haulage with a thread on the upper end, freely passing through the holes in the cylinder and supporting ring.

EFFECT: provided locking of blast products in the charge cavity before destruction of 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