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Compressive strength, burst proneness, and failure modes of model coal pillars related to the end constraint and geometry.

Authors
Babcock CO
Source
Rock mechanics: proceedings of the 28th U.S. Symposium on Rock Mechanics, June 29 - July 1, 1987, Tucson, Arizona. Farmer IW, Dacmen JJK, Desai CS, Neuman SP, eds. Boston, MA: A. A. Balkema, 1987 Jun; :173- 180
NIOSHTIC No.
10005769
Abstract
This paper describes tests conducted to determine the relationships between strength, constraint, geometry, and failure mode in coal pillars broken under compression. The model pillars used were 54 mm in diameter with varying diameter-to-length ratios and end conditions, and were composed of coals from Colorado and Utah. The study concluded that the roof-pillar-floor sequence, not the pillar geometry alone, should be an important factor in the design of coal pillars.
Keywords
Mining; Coal mining; Pillar mechanics; Underground mining; Underground mines; Coal mines; Compression tests; Compressive strength; Pillar design; Structural analysis; Structural design; Roof supports
Publication Date
19870629
Document Type
OP; Conference/Symposia Proceedings
Editors
Farmer IW; Dacmen JJK; Desai CS; Neuman SP
Fiscal Year
1987
NTIS Accession No.
NTIS Price
ISBN No.
9789061916994
Identifying No.
OP 89-87
NIOSH Division
DRC
Source Name
Rock mechanics: proceedings of the 28th U.S. Symposium on Rock Mechanics, June 29 - July 1, 1987, Tucson, Arizona
State
CO; AZ
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