METHOD AND DEVICE TO PERFORM BLASTING WITH SMALL CHARGES Russian patent published in 2012 - IPC E21B7/00 E21C37/12 

FIELD: blasting.

SUBSTANCE: by means of a drilling machine arranged in a drilling assembly, first a blasthole is drilled into the material to be mined, and then the drilling tool is withdrawn from the blasthole. Then one or more propellants are delivered to the blasthole bottom via a channel of propellant supply joined with a feed beam. Then the blasthole is filled, and the propellant is exploded, as a result of which high pressure of gas is produced, which causes hydraulic rupture of material to be mined. During supply and explosion of the propellant the drilling plant is supported as directed in parallel to the blasthole.

EFFECT: continuous performance of blasting with application of a regular machine for drilling in rocks.

14 cl, 11 dwg