Investigation of Longwall Gateroad Roof Support Characteristics at Powhatan No. 4 Mine

Instrumentation Plan

by Alexander May, Bill M. Stewart, Charles D. Litton, David C. Oyler, Donald A. Stanley, Eugene D. Calvert, Gregory J. Chekan, Jalna R. Zatko, John E. Pahlman, Judith A. Eisele, K. O. Bennington, Laurence L. Oden, R. H. Lien, Rolland Laws Blake, Sathit Tandanand, Thomas G. Carnahan, Victor R. Spironello, Robert J. Timko, Bernard J. Scheiner, Carl F. Anderson, D. A. Martin, Daniel R. Babich, Frank Ronald Smith, Howard W. Leavenworth, Ishwarlal D. Shah, John W. Sweeney, Kenneth L. Williams, Larry R. Powell, Lynn A. Atkins, Marion P. Krug, Martin Hertzberg, Roald Edmund Lindstrom, William P. Diamond, Pat M. Brown, Aldo L. Furno, Annie G. Smelley, Donald J. Bauer, George H. Schnakenberg, R. A. McCune, Ralph H. Nafziger, Robert R. Brown, S. E. Khalafalla, William I. Nissen