Acoustic emission of coal in the postlimiting deformation state

Journal Article · Mon Aug 01 00:00:00 EDT 2005 · Journal of Mining Science (English Translation)

DOI:https://doi.org/10.1007/s10913-005-0094-0· OSTI ID:20701175

Voznesenskii, A S; Tavostin, M N ^[1]

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1. Moscow State Mining University, Moscow (Russian Federation)

The features of acoustic emission in coal samples in the state of pre- and postlimiting deformation are considered. It is shown that in the postlimiting deformation stages and in the transient period, a contrary change is observed in a correlation coefficient of the acoustic emission activity N{Sigma} recorded in the upper and lower portions of a sample; whereas in the prelimiting deformation stages, this change is consistent. It is proposed to recognize the stages of deformation by the correlation coefficient of N{Sigma} recorded in different zones: a positive coefficient corresponds to the prelimiting stage of deformation, and a negative one corresponds to the postlimiting stage.

• OSTI ID: 20701175
• Journal Information: Journal of Mining Science (English Translation), Vol. 41, Issue 4; ISSN 1062-7391
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL
ACOUSTICS
DEFORMATION
ACOUSTIC MEASUREMENTS