Quasi-static and creep data for dome salt from Bryan Mound, Texas

Technical Report · Sat Nov 01 04:00:00 EST 1980

OSTI ID:7055056

Wawersik, W R; Holcomb, D J; Hannum, D W; Lauson, H S

Experiments are described for quasi-static loading conditions and for creep at zero, 500 (3.5) and 2000 (13.8 MPa) psi confining pressure and at 22 and 60/sup 0/C. All quasi-static test results were consistent with data from other sources including unconfined and triaxial compressive strengths, ultimate strains, secant moduli during first laboratory loading and elastic constants. In contrast, creep of Bryan Mound salt was anomalous in that the observed creep rates were one to two orders of magnitude smaller than the typical creep rates of other rock salt of similar purity subjected to the same conditions of stress and temperature. No temperature effect was resolved on creep of Bryan Mound salt within the scatter of the data. Comparative data for triaxial compression and extension suggest reductions in the failure strains and changes in the failure modes with increasing intermediate principal stress. These effects are attributed to differences in microfracture networks. Microfracturing was observed optically and indirectly by measuring acoustic emissions. The acoustic emissions correlated directly with the magnitude of the observed volumetric strain.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 7055056
• Report Number(s): SAND-80-1434
• Country of Publication: United States
• Language: English

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BOREHOLES
CAVITIES
COMPRESSION
CREEP
DATA
ELASTICITY
EXPERIMENTAL DATA
GEOLOGIC DEPOSITS
INFORMATION
MECHANICAL PROPERTIES
MONITORING
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TENSILE PROPERTIES
TEXAS
USA