New techniques for measuring rock fracture energy

Journal Article · Sat Jun 01 04:00:00 EDT 1974 · Soc. Pet. Eng. J.; (United States)

DOI:https://doi.org/10.2118/4060-PA· OSTI ID:7337355

Krech, W W; Chamberlain, P G

The use of closed-loop, servocontrolled test systems to obtain rock fracture energy measurements in uniaxial tension, torsion, and direct shear is described. Results of fracture energy tests performed on three rock types are presented. Analysis of the test results substantiates the validity of measuring fracture energy by the new test techniques. The advantage of these new tests, providing data potentially useful for input into analytical rock response calculations, far outweighs the advantage, simplicity of test procedure, of the usual test methods. Fracture energy values for three rock types tested under four different load configurations indicate that fracture energy requirements depend upon the type of loading applied to the specimen. The ratio of fracture energy required in uniaxial compression to that required in uniaxial tension ranges from 140 for Berea sandstone to 560 for Barre granite.

• Research Organization: Bureau of Mines, Twin Cities, MN
• OSTI ID: 7337355
• Journal Information: Soc. Pet. Eng. J.; (United States), Journal Name: Soc. Pet. Eng. J.; (United States) Vol. 14:3; ISSN SPTJA
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580300* -- Mineralogy
Petrology
& Rock Mechanics-- (-1989)
CARBONATE ROCKS
COMMINUTION
DEFORMATION
FRACTURE PROPERTIES
FRACTURING
GRANITES
HYDRAULIC FRACTURING
IGNEOUS ROCKS
LIMESTONE
MATERIALS TESTING
MEASURING METHODS
MECHANICAL PROPERTIES
MECHANICAL TESTS
RESERVOIR ROCK
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
SHEAR
TENSILE PROPERTIES
TEST FACILITIES
TESTING