EXTENDED SHAPED EXPLOSIVE CHARGE "QUASAR" Russian patent published in 1996 - IPC

FIELD: separation of objects by explosion. SUBSTANCE: extended shaped explosive charge includes shell 1 with cross-section in the form of figure which outline is formed by several identical lobes creating shaped recesses with opening angle 70-130 deg, conjugation radius of generatrices equal to 0.05-0.3 length of lobe and conjugation radius of lobes outside of shaped recess amounting to 0.15-0.6 length of lobe. Lobe is formed by interconjugated sections of straight lines with angle 0-25 deg between them and conjugation radius equal to 0.15-0.35 length of lobe. Shell thickness lies within 0.05-0.2 length of lobe. Shell houses explosive in the form of mixture of nitrogen tetraoxide with products of oil refining in volumetric relation 0.9-9:1. Shell can be made from polymer material having density > 1.0 kg/sq. dm. Metal insert may be placed into recesses. Recesses may also filled with foam plastic. EFFECT: increased blasting efficiency. 6 cl, 10 dwg