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New systems for coal extraction with special applications for rib pillar extraction and pillar extraction: Obermaier, H; Urschitz, E; Habenicht, H Proc 13th World Mining Congress, Improvement of Mine Productivity and Overall Economy by Modern Technology, Stockholm, June 1987V2, P461–469. Publ Rotterdam: A A Balkema, 1987

Publisher: Elsevier Science
Year: 1988
Tongue: English
Weight: 113 KB
Volume: 25
Category: Article
ISSN: 0148-9062
DOI: 10.1016/0148-9062(88)90443-3

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