METHOD FOR CHARGE INITIATION Russian patent published in 2010 - IPC F42D3/04 

FIELD: blasting.

SUBSTANCE: breaking is carried out by arrangement of detonating cord in the form of orderly broken line in the side of charge wall external versus broken massif, besides, period of broken line (in m) equals H=2d_c·cosα/sinα, where d_c is diametre of column charge, m, α= 15÷52 gr., and amplitude of oscillation (in m) makes a = d_c·sin²α.

EFFECT: invention makes it possible to improve extent of rocks crushing by development of nonlinear initiation in direction of blasted unit ledge slope.

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