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Title: Size effect on acoustic emission characteristics of coal-rock damage evolution
Authors: Wen, Z 
Wang, X
Chen, L
Lin, G 
Zhang, H
Issue Date: 2017
Publisher: Hindawi Publishing Corporation
Source: Advances in materials science and engineering, 2017, v. 2017, 3472485 How to cite?
Journal: Advances in materials science and engineering 
Abstract: Coal-gas outburst, rock burst, and other mine dynamic disasters are closely related to the instability and failure of coal-rock. Coal-rock is the assemblies of mineral particles of varying sizes and shapes bonded together by cementing materials. The damage and rupture process of coal-rock is accompanied by acoustic emission (AE), which can be used as an effective means to monitor and predict the instability of coal-rock body. In this manuscript, considering the size effect of coal-rock, the influence of different height to diameter ratio on the acoustic emission characteristics of coal-rock damage evolution was discussed by microparticle flow PFC2D software platform. The results show that coal-rock size influences the uniaxial compressive strength, peak strain, and elastic modulus of itself; the size effect has little effect on the acoustic emission law of coal-rock damage and the effects of the size of coal-rock samples on acoustic emission characteristics are mainly reflected in three aspects: the triggering time of acoustic emission, the strain range of strong acoustic emission, and the intensity of acoustic emission; the damage evolution of coal-rock specimen can be divided into 4 stages: initial damage, stable development, accelerated development, and damage.
ISSN: 1687-8434
EISSN: 1687-8442
DOI: 10.1155/2017/3472485
Rights: Copyright © 2017 Zhijie Wen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The following article: Wen, Z., Wang, X., Chen, L., Lin, G., & Zhang, H. (2017). Size effect on acoustic emission characteristics of coal-rock damage evolution. Advances in Materials Science and Engineering, 2017, is available at https//
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