Size Effect on Acoustic Emission Characteristics of Coal-Rock Damage Evolution
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 accompa...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2017/3472485 |
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| author | Zhijie Wen Xiao Wang Lianjun Chen Guan Lin Hualei Zhang |
| author_facet | Zhijie Wen Xiao Wang Lianjun Chen Guan Lin Hualei Zhang |
| author_sort | Zhijie Wen |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-85a79f6bedf6444997bfc2a2d36e8223 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-85a79f6bedf6444997bfc2a2d36e82232025-02-03T05:50:48ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422017-01-01201710.1155/2017/34724853472485Size Effect on Acoustic Emission Characteristics of Coal-Rock Damage EvolutionZhijie Wen0Xiao Wang1Lianjun Chen2Guan Lin3Hualei Zhang4Key Laboratory of Safety and High-Efficiency Coal Mining, Ministry of Education, Anhui University of Science and Technology, Huainan 232001, ChinaState Key Laboratory of Mining Disaster Prevention and Control Cofounded by Shandong Province and The Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, ChinaState Key Laboratory of Mining Disaster Prevention and Control Cofounded by Shandong Province and The Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, ChinaDepartment of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Kowloon 999077, Hong KongKey Laboratory of Safety and High-Efficiency Coal Mining, Ministry of Education, Anhui University of Science and Technology, Huainan 232001, ChinaCoal-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.http://dx.doi.org/10.1155/2017/3472485 |
| spellingShingle | Zhijie Wen Xiao Wang Lianjun Chen Guan Lin Hualei Zhang Size Effect on Acoustic Emission Characteristics of Coal-Rock Damage Evolution Advances in Materials Science and Engineering |
| title | Size Effect on Acoustic Emission Characteristics of Coal-Rock Damage Evolution |
| title_full | Size Effect on Acoustic Emission Characteristics of Coal-Rock Damage Evolution |
| title_fullStr | Size Effect on Acoustic Emission Characteristics of Coal-Rock Damage Evolution |
| title_full_unstemmed | Size Effect on Acoustic Emission Characteristics of Coal-Rock Damage Evolution |
| title_short | Size Effect on Acoustic Emission Characteristics of Coal-Rock Damage Evolution |
| title_sort | size effect on acoustic emission characteristics of coal rock damage evolution |
| url | http://dx.doi.org/10.1155/2017/3472485 |
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