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Overcoring Equipment and Techniques Used in Rock Stress Determination.

Authors
Hooker-VE; Bickel-DL
Source
NTIS: PB 231 107 :32 pages
Link
NIOSHTIC No.
10000803
Abstract
Stress-relief techniques and instrumentation have been developed through many years of research in the federal Bureau of Mines and successfully used to determine the in situ state of stress in rock. This paper describes the drilling equipment and accessories for use with the federal Bureau of Mines three-component deformation borehole gage. Operation and calibration procedures for the deformation gage are discussed in detail. Site selection and overcoring procedures are included to provide a complete working knowledge for surface or underground applications.
Publication Date
19740101
Document Type
IH; Information Circular;
Fiscal Year
1974
NTIS Accession No.
PB-231107
NTIS Price
A04
Identifying No.
IC 8618
NIOSH Division
DRC;
Source Name
NTIS: PB 231 107
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