122.
(11) Patent number: 2151291
(46) Date of publication: 20.06.2000
(51) Int. Cl.7: E 21 C 41/00
(21) Application number: 98106219/03
(22) Application date: 06.04.1998
(71) Applicant:
Institut gornogo dela Severa SO RAN
(72) Inventor:
Vasil'ev P.N.,
Efremov A.P.,
Ognev S.M.
(73) Proprietor:
Institut gornogo dela Severa SO RAN
(98) Mail address:
677091, g.Jakutsk, pr. Lenina 43, Institut gornogo dela Sever
(54) METHOD OF COMBINED MINING OF SERIES OF CONTIGUOUS SEAMS
(57)
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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