METHOD OF FORMATION OF CUTTING CAVITY Russian patent published in 1997 - IPC

Abstract RU 2081392 C1

FIELD: making of mining opening of any purpose, shape and cross-section. SUBSTANCE: the method consists in drilling of a wedge stepped cut, charging, alternate bursting of the formed steps of the wedge cut with formation of a cutting cavity of the necessary depth. Blast-holes of the wedge stepped cut are drilled proceeding from the condition of optimum work of each blasted hole on the naked plane that is available or formed by the blasted hole. EFFECT: facilitated procedure. 1 dwg

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RU 2 081 392 C1

Authors

Andrievskij A.P.

Dates

1997-06-10—Published

1992-11-16—Filed