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High Resolution Seismic Exploration for Geologic Faults in Coal Seams.
For Reference Only At Bureau Libraries :37 pages
Coal seams approximately 7, 9, and 20 feet thick at depths of 250, 600, and 1,000 feet were detected using high resolution seismic reflection techniques. Investigation of seismic profiles indicates that good data are required to delineate faulting with only 20 feet of throw but that faulting with 20 feet of vertical displacement can be detected with poor data. Data acquired from dynamite charges fired in water saturated media were clearly superior to that acquired using charges dry tamped in 10- and 20-foot holes.
CP; Final Contract Report;
For Reference Only At Bureau Libraries
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division