ELONGATED CHARGE FOR PIN-POINT DESTRUCTION OF ROCKS BY BLAST Russian patent published in 2002 - IPC

FIELD: mining industry, in particular, drilling and blasting operations, applicable in mining working or mass breaking with the aid of pin-point blasting. SUBSTANCE: n the known elongated charge consisting of separate containers-cartridges made in the form of a cylinder-shaped shell with a longitudinal cumulative recess, cover with a face cumulative recess opposite the cover of end face bulge of the shell, repeating the shape of its face cumulative recess and positioned in the explosive charge shell, according to the invention, two and more recesses are made on the side of the cover in each cartridge on its cylindrical surface, and on the side of the end face bulge the cartridge is provided with catches according to the quantity of the recesses and relating their shape, the catches are located around the edges of the cartridge and do not project from the shell external outlines and in length they do not exceed or equal the height of the end face bulge of the shell-container. EFFECT: created an elongated charge of pin-point action with a strict orientation of the longitudinal cumulative recess of each cartridge. 1 cl, 4 dwg