Field evaluation of three longwall pillar systems in a Kentucky coal mine
By: by Timothy M. Barton and Christopher Mark.
Contributors: Mark, Christopher.
Series: Report of investigations / Bureau of Mines, United States Department of the Interior ;; 9283; Report of investigations (United States. Bureau of Mines) :; 9283.
Publisher: U.S. Dept. of the Interior, Bureau of Mines
Published: 1989
Place of publication: Washington, D.C
Language: eng
Number of pages: 13
Subjects: Columns -- Testing.; Ground control (Mining); Longwall mining -- Kentucky -- Letcher County.
Notes: Bibliography: p. 13.