Study on Low-Frequency TEM Effect of Coal during Dynamic Rupture
Dynamic loads provided by the SHPB test system were applied to coal specimens, and the TEM signals that emerged during coal rupture were recorded by the TMVT system. Experiments on coal-mass blasting rupture in excavating workface were also carried out, and the emerged TEM signal was analyzed. The r...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2015/189569 |
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| author | Cheng-wu Li Chuan Wang Bei-jing Xie Xiao-yuan Sun Xiao-meng Xu |
| author_facet | Cheng-wu Li Chuan Wang Bei-jing Xie Xiao-yuan Sun Xiao-meng Xu |
| author_sort | Cheng-wu Li |
| collection | DOAJ |
| description | Dynamic loads provided by the SHPB test system were applied to coal specimens, and the TEM signals that emerged during coal rupture were recorded by the TMVT system. Experiments on coal-mass blasting rupture in excavating workface were also carried out, and the emerged TEM signal was analyzed. The results indicate that the low-frequency TEM signals were detected close to the coal specimens under high strain dynamic load applied by the SHPB, initially rising sharply and dropping rapidly, followed by a small tailing turbulence. And the field test results obtained during coal blasting process coincided with the results from the SHPB tests. Furthermore, its initial part shaped like a pulse cluster had a more pronounced tail and lasted even longer. And the generation mechanism of the low-frequency TEM effect was analyzed. It suggests that the low-frequency TEM effect of coal during dynamic rupture is contributed by the fractoemission mechanism and the resonance or waveguide effects. Because its wavelength is longer than the higher ones, the low-frequency TEM has a good anti-interference performance. That can expand the scope and performance of the coal-rock dynamic disaster electromagnetic monitoring technique. |
| format | Article |
| id | doaj-art-7ca623eff344447896d43872bda4fd73 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-7ca623eff344447896d43872bda4fd732025-02-03T01:21:35ZengWileyShock and Vibration1070-96221875-92032015-01-01201510.1155/2015/189569189569Study on Low-Frequency TEM Effect of Coal during Dynamic RuptureCheng-wu Li0Chuan Wang1Bei-jing Xie2Xiao-yuan Sun3Xiao-meng Xu4School of Resource and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Resource and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Resource and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Resource and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Resource and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaDynamic loads provided by the SHPB test system were applied to coal specimens, and the TEM signals that emerged during coal rupture were recorded by the TMVT system. Experiments on coal-mass blasting rupture in excavating workface were also carried out, and the emerged TEM signal was analyzed. The results indicate that the low-frequency TEM signals were detected close to the coal specimens under high strain dynamic load applied by the SHPB, initially rising sharply and dropping rapidly, followed by a small tailing turbulence. And the field test results obtained during coal blasting process coincided with the results from the SHPB tests. Furthermore, its initial part shaped like a pulse cluster had a more pronounced tail and lasted even longer. And the generation mechanism of the low-frequency TEM effect was analyzed. It suggests that the low-frequency TEM effect of coal during dynamic rupture is contributed by the fractoemission mechanism and the resonance or waveguide effects. Because its wavelength is longer than the higher ones, the low-frequency TEM has a good anti-interference performance. That can expand the scope and performance of the coal-rock dynamic disaster electromagnetic monitoring technique.http://dx.doi.org/10.1155/2015/189569 |
| spellingShingle | Cheng-wu Li Chuan Wang Bei-jing Xie Xiao-yuan Sun Xiao-meng Xu Study on Low-Frequency TEM Effect of Coal during Dynamic Rupture Shock and Vibration |
| title | Study on Low-Frequency TEM Effect of Coal during Dynamic Rupture |
| title_full | Study on Low-Frequency TEM Effect of Coal during Dynamic Rupture |
| title_fullStr | Study on Low-Frequency TEM Effect of Coal during Dynamic Rupture |
| title_full_unstemmed | Study on Low-Frequency TEM Effect of Coal during Dynamic Rupture |
| title_short | Study on Low-Frequency TEM Effect of Coal during Dynamic Rupture |
| title_sort | study on low frequency tem effect of coal during dynamic rupture |
| url | http://dx.doi.org/10.1155/2015/189569 |
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