Field evaluation of three longwall pillar systems in a Kentucky coal mine

Author: Barton, T. M.
Additional Authors: Mark, Christopher.
Year: 1989
Document Type: BMRA
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.23:9283
Series: Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number: 9283
Subjects: Ground control (Mining)
Longwall mining--Kentucky--Letcher County
Columns--Testing
Link: https://hdl.handle.net/2027/mdp.39015078475517

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