Characterizing fracture types in rock/coal subjected to quasi-static indentation using acoustic emission technique

Conference · Tue Jan 01 00:00:00 EST 1985 · J. Acoust. Emiss.; (United States)

OSTI ID:5270057

Khair, A W

Geological materials emit transient noises when stressed. The rate and pattern of these transient noises or acoustic emissions (A.E. hereafter) depend on the stages of deformation of the material. It has been demonstrated that rock/coal fracture processes under stress consist of three distinctive stages--crack initiation, propagation and ultimate fracture-- and that coalescence of numerous cracks leads to ultimate failure rather than the propagation of a single crack. This paper presents an analysis of fracture formation in rock/coal specimens subjected to straight wedge indentors using A.E. technique.

• Research Organization: Mining Engineering Dept., West Virginia Univ., Morgantown, WV 26506
• OSTI ID: 5270057
• Report Number(s): CONF-8510159-
• Journal Information: J. Acoust. Emiss.; (United States), Conference: 2. international conference on acoustic emission, Lake Tahoe, NV, USA, 28 Oct 1985
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
58 GEOSCIENCES
COAL
ACOUSTIC EMISSION TESTING
FRACTURE MECHANICS
ROCKS
CRACK PROPAGATION
DEFORMATION
ROCK MECHANICS
SEISMIC NOISE
STRESSES
ACOUSTIC TESTING
CARBONACEOUS MATERIALS
ENERGY SOURCES
FOSSIL FUELS
FUELS
MATERIALS
MATERIALS TESTING
MECHANICS
NOISE
NONDESTRUCTIVE TESTING
TESTING
010600* - Coal
Lignite
& Peat- Properties & Composition
580300 - Mineralogy
Petrology
& Rock Mechanics- (-1989)