FIELD: blasting of deep-hole charges of commercial explosives, applicable in mining industry at rock breaking.
SUBSTANCE: the blast system of the deep-hole charge has one or several live primers initiated simultaneously, and installed in height of the charge casing of granulated or hydrated explosive are additional intermediate detonators with non-electric initiators, whose igniting set is directed towards the motion of the impact ignition wave and instantly operates from its action, the distance 
between the detonators or detonator and the end of the charge casing is calculated by the formula given in the description.
EFFECT: enhanced uniformity of rock crushing due to reduced yield of oversized (lumpy) fraction, enhanced yield of rock mass from 1 cu.m, reduced cost of blasting operations, enhanced capacity of the loading-transport and crushing-sorting machinery.
2 cl, 5 dwg, 1 ex
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