SHAPED CHARGE(VARIANTS) Russian patent published in 1998 - IPC

FIELD: destruction of rocks by directive action charges. SUBSTANCE: explosive charge has a shaped recess in the form of conjugated corrugations radially diverging from the recess apex relative to the charge central axis, crossing the charge base forming a non-convex polygon in the base. The conjugated corrugations are of different dimensions. Conjugation lines of the corrugations are made in the form of a broken line. Conjugation lines of the corrugations may be made in the form of a parabola, and the lateral surfaces of the corrugations - in the form of a part of a hyperbolic paraboloid. Corrugation ribs may be made in the form of a broken line. The sides of the non-convex polygon in the base may be made in the form of convex and concave curves, and the lateral surfaces of the corrugations - in the form of a part of a hyperbolic paraboloid. EFFECT: enhanced efficiency. 6 cl, 15 dwg