COMBINATION CHARGING TAMPING Russian patent published in 2007 - IPC F42D1/08 

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

SUBSTANCE: the combination charging tamping including a monolithic stopper of hardening materials is made of the upper and lower parts, the upper part represents a monolithic stopper of hardening materials, and the lower part-a charging of inert free-flowing materials over an air gap of foamed polystyrene.

EFFECT: enhanced efficiency of blast crushing of rocks due to a complete choking of the detonation products in the charging space up to crushing of the surrounding rock by a shortened combination tamping with an air gap over the charge.

1 dwg