EXTERNAL CHARGE OF HYDROEXPLOSIVE DESTRUCTION WITH CHAMBER FOR EXPLOSIVES Russian patent published in 2008 - IPC F42D1/00 F42D7/00 F42B3/00 

FIELD: explosive works.

SUBSTANCE: invention concerns the explosive technics, in particular to means of boulders demolition, and can be used on the open and underground mining operations, in building etc. The external explosives charge of hydroexplosive destruction contains an explosives capacity, a cartridge of explosive and a detonating cord. In the explosive capacity executed from a polymeric material and having in section the form of a rectangle with approximated corners, the chamber for explosives cartridge and a detonating cord is located. The relation of volume of the chamber to volume explosives capacity is equal 0.1-0.2. The factor of a chamber charge loading is equal 0.40-0.50, and the distance from the centre of explosive charge to a blown up surface makes 2-3 radiuses of a cartridge. In the explosive chamber the top end face has semicylinder form, and the bottom - with a view of increase of efficiency of explosion - has the form of the truncated pyramid that is a charge of double action on the destroyed file, carried out both a primary blast wave, and secondary, reflected from a cavity filled with a liquid. Air drains are located at the end face of the explosive capacity for replacement of air from the explosive chamber and formations in it of the rarefied space. The liquid placed in a cavity, at explosion dust suppression creates effect.

EFFECT: increase of efficiency of external charge of hydroexplosive boulders destruction at the expense of reduction of unproductive losses and fuller use of energy of explosion.

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