METHOD OF COMBINED MINING OF SERIES OF CONTIGUOUS SEAMS Russian patent published in 2000 - IPC

Abstract RU 2151291 C1

FIELD: mining industry. SUBSTANCE: novelty in method consists in that the second working on underlying seam is carried out with roof support on pillars and with leading of open work, and pillar extraction is accomplished with lagging behind open work for at least 100 m. EFFECT: higher efficiency. 2 dwg

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RU 2 151 291 C1

Authors

Vasil'Ev P.N.

Efremov A.P.

Ognev S.M.

Dates

2000-06-20—Published

1998-04-06—Filed