Compressive strength, burst proneness, and failure modes of model coal pillars related to the end constraint and geometry.
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
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.
Mining; Coal mining; Pillar mechanics; Underground mining; Underground mines; Coal mines; Compression tests; Compressive strength; Pillar design; Structural analysis; Structural design; Roof supports
OP; Conference/Symposia Proceedings
Farmer IW; Dacmen JJK; Desai CS; Neuman SP
Rock mechanics: proceedings of the 28th U.S. Symposium on Rock Mechanics, June 29 - July 1, 1987, Tucson, Arizona