Acoustic Emission Response Characteristics of Anthracitic Coal under Uniaxial Compression
Joint Authors
Wang, Gongda
Du, Feng
Wang, Haiyan
Ma, Ji
Zhang, Guojun
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-09-25
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
The damage evolution of coal is accompanied by the generation of acoustic emission (AE) signal.
Through the analysis and research of the AE response characteristics of coal deformation and failure, it is helpful to reveal the initiation, propagation, and fracture evolution of microcracks in coal.
In this work, taking the anthracite coal as research object, the basic mechanical parameters of the coal samples were obtained by ultrasonic tests and uniaxial compression experiments.
Meanwhile, the AE response characteristics of coal samples during uniaxial compression were obtained through AE experiments.
The results show that when the density is low, the wave velocity of the coal sample decreases with the increase of density.
When the density is higher than a certain value, the wave velocity of the coal sample increases with the increase of density.
Through the measurement of ultrasonic wave velocity, it is found that there is some nonuniformity and anisotropy in raw coal samples.
The ring counts, energy counts, and AE events with time in uniaxial compression process have approximately normal distribution.
The AE events are concentrated in the elastic stage and yield stage, and the energy amplitude of AE events is higher in the plastic stage.
Compared with the ring counts and energy counts, the AE events have a good positioning function, which can better reflect the evolution of internal cracks of coal samples during uniaxial compression.
American Psychological Association (APA)
Wang, Haiyan& Wang, Gongda& Zhang, Guojun& Du, Feng& Ma, Ji. 2020. Acoustic Emission Response Characteristics of Anthracitic Coal under Uniaxial Compression. Shock and Vibration،Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1213113
Modern Language Association (MLA)
Wang, Haiyan…[et al.]. Acoustic Emission Response Characteristics of Anthracitic Coal under Uniaxial Compression. Shock and Vibration No. 2020 (2020), pp.1-12.
https://search.emarefa.net/detail/BIM-1213113
American Medical Association (AMA)
Wang, Haiyan& Wang, Gongda& Zhang, Guojun& Du, Feng& Ma, Ji. Acoustic Emission Response Characteristics of Anthracitic Coal under Uniaxial Compression. Shock and Vibration. 2020. Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1213113
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1213113