Effect of Stress on Permeability of Coal.
Somerton-WH; Soylemezoglu-IM; Dudley-RC
NTIS: PB/235-854 Available for Reference At Bureau Libraries :56 pages
This report (Contract No. H0122027) discusses the effect of stress on the permeability of three bituminous coals to nitrogen and methane. Test stress conditions simulated stresses possible in underground environments to depths of 2,000 feet. The study found that the permeabilities of different samples of the same coal varied over a wide range, that permeabilities decreased by one or two orders of magnitude with increasing stress, and that the permeability of coal is very dependent on previous loading and unloading of the sample.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB/235-854; Available for Reference At Bureau Libraries
University of California