Strength and ductility of room-dry and water-saturated igneous rocks at low pressures and temperatures to partial melting. Final report

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

DOI:https://doi.org/10.2172/6919451· OSTI ID:6919451

Friedman, M; Handin, J; Higgs, N G; Lantz, J R; Bauer, S J

Rock types that are likely candidates for drilling were tested. Reported herein are the short-time ultimate strengths and ductilities determined at temperatures of 25/sup 0/ to 1050/sup 0/C and a strain rate of 10/sup -4/s/sup -1/ of (a) room-dry Mt. Hood Andesite, Cuerbio Basalt, and Charcoal (St. Cloud Gray) Granodiorite at confining pressures of 0, 50, and 100 MPa, (b) water-saturated specimens of the same three rocks at zero effective pressure (both pore and confining pressures of 50 MPa), and (c) room-dry Newberry Rhyolite Obsidian at 0 and 50 MPa. These strengths are then compared with the stresses developed at the wall of a borehole in an elastic medium at the appropriate temperatures and mean pressures to assess the problem of borehole stability. (MHR)

• Research Organization: Texas A and M Univ., College Station (USA). Center for Tectonophysics
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6919451
• Report Number(s): SAND-80-7159
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
152002* -- Geothermal Data & Theory-- Properties of Minerals & Rocks
ANDESITES
BASALT
BOREHOLES
BRITTLENESS
CAVITIES
COMPRESSION STRENGTH
DUCTILITY
FAILURES
FRACTURE PROPERTIES
FRACTURES
GRANITES
GRANODIORITES
Geothermal Legacy
HYDROGEN COMPOUNDS
IGNEOUS ROCKS
MAGMA
MECHANICAL PROPERTIES
OXYGEN COMPOUNDS
PLUTONIC ROCKS
RHYOLITES
ROCKS
SATURATION
STABILITY
STRAIN RATE
TENSILE PROPERTIES
ULTIMATE STRENGTH
VISCOSITY
VOLCANIC ROCKS
WATER