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Overcoring Equipment and Techniques Used in Rock Stress Determination (An Update of IC 8618).
MISSING :27 pages
Stress-relief techniques and instrumentation have been developed through many years of research in the Bureau of Mines and successfully used to determine the in situ state of stress in rock. This report describes the Bureau's three-component borehole deformation gauge and the drilling equipment and accessories used with it. Operation and calibration procedures for the deformation gauge are discussed in detail, along with site selection and overcoring procedures. Information and references included in this publicaiton provide a guide to the Bureau's overcoring method for determining rock stress.
IH; Information Circular;
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division