FIELD: blasting.
SUBSTANCE: invention is related to mining industry, also to construction, and may be used in blasting of rocks in open pits, trenches, ditches. Method for breaking of rock unit by explosion is carried out in mining enterprises, where it is necessary to arrange water drain. In order to develop layers with various physical properties in rock massif, prior to explosion, directly under unit, at specified depth in layer of water saturated rocks, screen is created by means of water pumping from this layer, thus reducing its level in massif till required location of screen. Depth of screen location is identified by required depth of breaking or mining of rocks, by length of blasting wells or height of ledge.
EFFECT: invention makes it possible to increase efficiency of crushing at all technological stages of mining production and to reduce energy inputs in process of blasting.
2 cl
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