FIELD: mining.
SUBSTANCE: invention relates to mining and mining industries. Method includes drilling two kinds of holes or holes of different diameters along the line of the cavity formed: the first – a larger diameter – pressing, the second – a smaller diameter – ejection, the placement of explosives in them and blasting. Ratio of the diameters of holes or wells of ejection and pressing is determined depending on the mining-geological and mining-technical conditions of production of these types of work. Method allows to increase the efficiency and safety of these types of work due to the optimal distribution of charges of different diameters in the array at a certain distance along the line of the cavity formed and to a certain depth determined for the specific mining and geological and mining conditions of the cavity being formed.
EFFECT: formation of the fissure cavity of any configuration of a given depth with a minimum flow rate for drilling and consumption of explosives.
4 cl, 2 dwg
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