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Thick seam retreat mining with yielding pillars : Wright, W L; Ko, K C; Fenstermaker, K C Proc 2nd International Conference on Innovative Mining Systems, Pennsylbia, 27–29 October 1986 P36–41. Publ Pennsylbia: Pennsylbia State University, 1986

Publisher: Elsevier Science
Year: 1987
Tongue: English
Weight: 135 KB
Volume: 24
Category: Article
ISSN: 0148-9062
DOI: 10.1016/0148-9062(87)92673-8

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