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(19)

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(11)

2 090 754

(13)

C1

(51)

IPC

(21) (22)

Application

94025105/03, 1994-07-04

(22)

Actual filing date

1994-07-04

(45)

Published

1997-09-20

(72)

Inventor

Fedorov L.N.

(73)

Holder

Institut Gornogo Dela Severa So Ran

METHOD OF OPENCAST MINING OF MINERAL DEPOSITS Russian patent published in 1997 - IPC

Abstract RU 2090754 C1

FIELD: mining, in particular, methods of excavation of, mainly, pipe-like or steeply dipping deposits, for instance, diamond and gold; applicable in sinking mine shafts, deep foundation pits and prospecting and working pits. SUBSTANCE: method consists in that mineral is separated from rock mass and supplied to mouth of hole which is drilled by device conveying cuttings to bottom hole and lifting them to surface through internal channels of drill string. EFFECT: higher efficiency. 3 cl, 5 dwg

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RU 2 090 754 C1

Authors

Fedorov L.N.

Dates

1997-09-20—Published

1994-07-04—Filed

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