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1 455 826

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A1

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IPC

(21) (22)

Application

4245616/23, 1987-05-14

(22)

Actual filing date

1987-05-14

(45)

Published

1995-09-10

(72)

Inventor

Shujfer M.I.Azarkovich A.E.

METHOD FOR LOOSENING SOLID ROCK BY BLASTING Russian patent published in 1995 - IPC

Abstract SU 1455826 A1

FIELD: drilling and blasting operations. SUBSTANCE: method for loosening solid rock by blasting includes drilling of hole row, installation of explosive charges and live primers. Live primers are placed in the second and subsequent holes within charge at hole depth determined by offered formula. Detonating cord circuit is initiated on the side of row first holes. EFFECT: higher reduction ratio of rock due to utilization of phenomenon of resonance excitation of solid rock jointing of rock mass by blast waves. 1 dwg, 1 tbl

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SU 1 455 826 A1

Authors

Shujfer M.I.

Azarkovich A.E.

Dates

1995-09-10—Published

1987-05-14—Filed

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