On Federal land, Gilsonite is presently being extracted by two major mining companies using simple, non-mechanized but practical mining methods. Typically the 1-6-ft (.3-2-m) wide vertical veins are extracted leaving a 35-ft (110-m) thick rich layer near the surface (crown pillar) and other barrier pillars 10-30-ft (3-10-m) thick between 100-ft (30-m) tall stopes. Mining has historically been conducted in a descending order using a 10-ft (3-m) drift and slopes while systematically supporting the stope walls with timber.
Stability Analyses of Replacing Barrier Pillars Between Stopes with Backfill in Gilsonite Mines of Utah
Maleki, H., Perkes, S., and R. Heath. "Stability Analyses of Replacing Barrier Pillars Between Stopes with Backfill in Gilsonite Mines of Utah." Paper presented at the 47th U.S. Rock Mechanics/Geomechanics Symposium, San Francisco, California, June 2013.
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