Study of Acoustic Emission and Mechanical Characteristics of Coal Samples under Different Loading Rates
Joint Authors
Li, Huamin
Li, Huigui
Gao, Baobin
Jiang, Dongjie
Feng, Junfa
Source
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-05-10
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
To study the effect of loading rate on mechanical properties and acoustic emission characteristics of coal samples, collected from Sanjiaohe Colliery, the uniaxial compression tests are carried out under various levels of loading rates, including 0.001 mm/s, 0.002 mm/s, and 0.005 mm/s, respectively, using AE-win E1.86 acoustic emission instrument and RMT-150C rock mechanics test system.
The results indicate that the loading rate has a strong impact on peak stress and peak strain of coal samples, but the effect of loading rate on elasticity modulus of coal samples is relatively small.
When the loading rate increases from 0.001 mm/s to 0.002 mm/s, the peak stress increases from 22.67 MPa to 24.99 MPa, the incremental percentage is 10.23%, and under the same condition the peak strain increases from 0.006191 to 0.007411 and the incremental percentage is 19.71%.
Similarly, when the loading rate increases from 0.002 mm/s to 0.005 mm/s, the peak stress increases from 24.99 MPa to 28.01 MPa, the incremental percentage is 12.08%, the peak strain increases from 0.007411 to 0.008203, and the incremental percentage is 10.69%.
The relationship between acoustic emission and loading rate presents a positive correlation, and the negative correlation relation has been determined between acoustic emission cumulative counts and loading rate during the rupture process of coal samples.
American Psychological Association (APA)
Li, Huamin& Li, Huigui& Gao, Baobin& Jiang, Dongjie& Feng, Junfa. 2015. Study of Acoustic Emission and Mechanical Characteristics of Coal Samples under Different Loading Rates. Shock and Vibration،Vol. 2015, no. 2015, pp.1-11.
https://search.emarefa.net/detail/BIM-1078159
Modern Language Association (MLA)
Li, Huamin…[et al.]. Study of Acoustic Emission and Mechanical Characteristics of Coal Samples under Different Loading Rates. Shock and Vibration No. 2015 (2015), pp.1-11.
https://search.emarefa.net/detail/BIM-1078159
American Medical Association (AMA)
Li, Huamin& Li, Huigui& Gao, Baobin& Jiang, Dongjie& Feng, Junfa. Study of Acoustic Emission and Mechanical Characteristics of Coal Samples under Different Loading Rates. Shock and Vibration. 2015. Vol. 2015, no. 2015, pp.1-11.
https://search.emarefa.net/detail/BIM-1078159
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1078159