NIOSHTIC-2 Publications Search

Field evaluation of yield pillar systems at a Kentucky longwall headgate.

Authors
Mark C; Barton T
Source
Proceedings of the 7th International Conference on Ground Control in Mining, August 3-5, 1988, Morgantown, West Virginia. Peng SS, ed. Morgantown, WV: West Virginia University, 1988 Aug; :1-9
Link
NIOSHTIC No.
10006157
Abstract
This paper describes research conducted by the Bureau of Mines to assess the effectiveness of different chain pillar designs in maintaining gate entry stability. The study described in this paper was performed in a 1,200-ft-long, experimental headgate section which contained three pillar designs: a three-entry, yield-abutment pillar system, a four-entry, yield-yield-abutment pillar system, and a five-entry, all-yield pillar system. As the longwall mined by the experimental section, Bureau engineers monitored entry convergence, roof sag, and changes in roof quality. The results of the study indicate that the all-yield system performed at least as well as, and probably better than, the two abutment pillar systems.
Keywords
Mining; Mining industry; Ground control; Longwall mining
Publication Date
19880803
Document Type
OP; Conference/Symposia Proceedings
Editors
Peng SS
Fiscal Year
1988
ISBN No.
9780930284374
Identifying No.
OP 104-88
NIOSH Division
PRC
Source Name
Proceedings of the 7th International Conference on Ground Control in Mining, August 3-5, 1988, Morgantown, West Virginia
State
KY; PA; WV
Page last reviewed: May 3, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division