Interactions Between Multiple Seam Longwall and Room-and-pillar Operations

Auteur : Alexander May, Bernard J. Steblay, Gregory J. Chekan, Gregory M. Molinda, Howard W. Kilau, J. Alton Burks, John C. Edwards, Richard J. Mainiero, Roy H. Grau, Thomas M. Barczak, David K. Ingram, James Reid Boyle, Lon D. Santis, Rudy J. Matetic, Thomas C. Ruhe, Thomas E. Marshall, Ellsworth R. Spencer

Date de publication : 1989

Éditeur : U.S. Department of the Interior, Bureau of Mines

Nombre de pages : 27