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Stress Ellipsoid Determination in a Rock-Burst-Prone Area at a 4,000-Foot Depth, Galena Mine, Wallace, Idaho
Report issued by the Bureau of Mines over a study on "stress determinations in an area known to be under high stress concentration induced by prior mining operations" (p. 2). The geology, procedures, and instrumentation are discussed. This report includes tables, illustrations, and photographs.
Date:
August 1967
Creator:
Ageton, Robert W.
System:
The UNT Digital Library
Preparation Characteristics of Pennsylvania Anthracite from the Bottom Red Ash Bed, Northern Field
Report issued by the Bureau of Mines on the anthracite coal in the Bottom Red Ash Bed in Pennsylvania. The coal samples were analyzed for thickness and geologic structure. The amount of recoverable coal was also estimated. This report includes tables, maps, and illustrations.
Date:
July 1967
Creator:
Sanner, William S.
System:
The UNT Digital Library