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2 039 282

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IPC

(21) (22)

Application

5032395/03, 1992-03-16

(22)

Actual filing date

1992-03-16

(45)

Published

1995-07-09

(72)

Inventor

Abashin S.I.Bojtsov N.P.Mishedchenko A.D.Obruchev Ju.S.Skums I.N.

(73)

Holder

Sankt-Peterburgskij Gosudarstvennyj Gornyj Institut Im.G.V.Plekhanova Universitet)

METHOD FOR PROTECTION OF VERTICAL SHAFTS FROM ROCK PRESSURE Russian patent published in 1995 - IPC

Abstract RU 2039282 C1

FIELD: mining. SUBSTANCE: method for protection of vertical shafts from rock pressure includes formation round the shaft of relief spaces in form of fan of inclined-vertical and helical holes. Holes are drilled from mouths located on surface and on circular contours of ground conjugation with shaft vertical walls at the level of hole bottoms of hole fan preliminarily drilled in previous cycle. EFFECT: higher efficiency. 1 dwg

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RU 2 039 282 C1

Authors

Abashin S.I.

Bojtsov N.P.

Mishedchenko A.D.

Obruchev Ju.S.

Skums I.N.

Dates

1995-07-09—Published

1992-03-16—Filed