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2 078 210

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C1

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IPC

(21) (22)

Application

94009056/03, 1994-03-14

(22)

Actual filing date

1994-03-14

(45)

Published

1997-04-27

(72)

Inventor

Bykov A.N.Bykov N.A.

(73)

Holder

Institut Gornogo Dela Severa So Ran

METHOD FOR ESTABLISHMENT OF ARTIFICIAL ROOF IN SLICE MINING OF THICK PERMAFROST COAL SEAMS Russian patent published in 1997 - IPC

Abstract RU 2078210 C1

FIELD: mining industry; applicable in underground mining of thick coal seams. SUBSTANCE: extraction of upper layer is effected with small thickness to prevent overturning and chaotization of caved blocks of rocks in space behind the support and establishment of cantilever rock roofing. EFFECT: higher efficiency. 1 dwg

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RU 2 078 210 C1

Authors

Bykov A.N.

Bykov N.A.

Dates

1997-04-27—Published

1994-03-14—Filed

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