METHOD OF UNLOADING MOUNTAIN MASSIF FROM STRESSES UPON CUTTING PARALLEL DRIFTS Russian patent published in 1995 - IPC

Abstract RU 2034988 C1

FIELD: mining equipment. SUBSTANCE: in order to enhance an efficiency of operations of unloading a massif around a drift by a useful recovery of seismic energy of explosion in the mountain rock near the drift, method comprises steps of determining a maximum distance Rmaxост

from a center of the drift until the most remote boundary of increased stress zone, for example by an ultrasonic way; setting a distance between centers of faces, being equal to 2Rmaxост

; performing drilling and exploding of tunneling bore holes at different time moments in first drift 1, then in second drift 2 and again in the first drift and so on. EFFECT: enhanced reliability. 1 cl

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RU 2 034 988 C1

Authors

Tjupin V.N.

Dates

1995-05-10—Published

1990-02-08—Filed