METHOD FOR INITIATION OF EXPLOSIVE Russian patent published in 2001 - IPC

FIELD: initiation means, in particular, method for excitation of the detonation process in an explosive by an impact of a fragment. SUBSTANCE: the method for initiation of an explosive by the "fragmentation" method consists in installation of a detonator on the explosive to be initiated in a spaced relation, covering of this explosive with an inert spacer; the thickness of detonator charge "h" should be "active" not ;less than its "active" portion h_a determined by the following relation: h = r_m•ρL•δ₁/ρE, where r_m - coefficient equal to 2.5; ρL,ρE - density of the material of the cartridge case bottom and the explosive of the detonator charge; δ₁ - bottom thickness. The space between the detonator and the spacer external surface is determined by the following relation: δ₂ = h_a/3, where h_a - thickness of the active portion of the detonator charge equal to the calculated thickness of the charge according to the above formula at an equality of relations. A blind hole is provided in the inert spacer and the thickness of the bottom in the blind hole is determined by relation: δ₃ = d_cr•P_cr/4•τ_cut, where P_cr - critical pressure for the initiated explosive; d_cr - diameter of the hole in the spacer equal to the critical diameter of the initiated explosive; τ_cut - limit of destruction for a cut of the material of the inert spacer. The spacer thickness is selected within 3 to 4 of thickness δ₃ of the bottom of the spacer blind hole. EFFECT: enhanced excitation of detonation process. 1 dwg