An Experiment Monitoring Signals of Coal Bed Simulation under Forced Vibration Conditions
An experiment simulating coal seam under forced vibration conditions was conducted. Acceleration response and microseism signal during the experiment were collected and analyzed. It is found that, with an increasing amount of vibration, the natural frequency of the specimen decreases, and this pheno...
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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/10.1155/2015/693612 |
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| _version_ | 1832556611289219072 |
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| author | Chengwu Li Po Hu Tianbao Gao Yingfeng Sun Shengyang Shao Qifei Wang |
| author_facet | Chengwu Li Po Hu Tianbao Gao Yingfeng Sun Shengyang Shao Qifei Wang |
| author_sort | Chengwu Li |
| collection | DOAJ |
| description | An experiment simulating coal seam under forced vibration conditions was conducted. Acceleration response and microseism signal during the experiment were collected and analyzed. It is found that, with an increasing amount of vibration, the natural frequency of the specimen decreases, and this phenomenon reflects fractures appearing in the specimen. Acceleration response signals show that peaks in shock excitation frequency and shock excitation acceleration affect the acceleration response, which reflects damage to the specimen. When shock excitation frequency nears natural frequency, the acceleration response first decreases and then increases. When resonance occurs, it reaches its maximum value. As shock excitation acceleration peaks increase, the acceleration response peak of the specimen also increases. We conclude that destruction is mainly concentrated in the coal seam evidenced by specimen destruction situation. Then shock excitation frequency and shock excitation acceleration influence on microseism signals were analyzed by Hilbert-Huang transform. By receiving these signals and analyzing their characteristics, it is beneficial to develop new methods to predict disasters underground dynamically in the future. |
| format | Article |
| id | doaj-art-5ed37b69d9454a9495f0bd43850cd7a1 |
| 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-5ed37b69d9454a9495f0bd43850cd7a12025-02-03T05:44:54ZengWileyShock and Vibration1070-96221875-92032015-01-01201510.1155/2015/693612693612An Experiment Monitoring Signals of Coal Bed Simulation under Forced Vibration ConditionsChengwu Li0Po Hu1Tianbao Gao2Yingfeng Sun3Shengyang Shao4Qifei Wang5Faculty of Resources & Safety Engineering, China University of Mining & Technology, Beijing, D11 Xuyuan Road, Haidian District, Beijing 100083, ChinaFaculty of Resources & Safety Engineering, China University of Mining & Technology, Beijing, D11 Xuyuan Road, Haidian District, Beijing 100083, ChinaSchool of Energy and Safety Engineering, Tianjin Chengjian Uninversity, Tianjin 300384, ChinaFaculty of Resources & Safety Engineering, China University of Mining & Technology, Beijing, D11 Xuyuan Road, Haidian District, Beijing 100083, ChinaFaculty of Resources & Safety Engineering, China University of Mining & Technology, Beijing, D11 Xuyuan Road, Haidian District, Beijing 100083, ChinaFaculty of Resources & Safety Engineering, China University of Mining & Technology, Beijing, D11 Xuyuan Road, Haidian District, Beijing 100083, ChinaAn experiment simulating coal seam under forced vibration conditions was conducted. Acceleration response and microseism signal during the experiment were collected and analyzed. It is found that, with an increasing amount of vibration, the natural frequency of the specimen decreases, and this phenomenon reflects fractures appearing in the specimen. Acceleration response signals show that peaks in shock excitation frequency and shock excitation acceleration affect the acceleration response, which reflects damage to the specimen. When shock excitation frequency nears natural frequency, the acceleration response first decreases and then increases. When resonance occurs, it reaches its maximum value. As shock excitation acceleration peaks increase, the acceleration response peak of the specimen also increases. We conclude that destruction is mainly concentrated in the coal seam evidenced by specimen destruction situation. Then shock excitation frequency and shock excitation acceleration influence on microseism signals were analyzed by Hilbert-Huang transform. By receiving these signals and analyzing their characteristics, it is beneficial to develop new methods to predict disasters underground dynamically in the future.http://dx.doi.org/10.1155/2015/693612 |
| spellingShingle | Chengwu Li Po Hu Tianbao Gao Yingfeng Sun Shengyang Shao Qifei Wang An Experiment Monitoring Signals of Coal Bed Simulation under Forced Vibration Conditions Shock and Vibration |
| title | An Experiment Monitoring Signals of Coal Bed Simulation under Forced Vibration Conditions |
| title_full | An Experiment Monitoring Signals of Coal Bed Simulation under Forced Vibration Conditions |
| title_fullStr | An Experiment Monitoring Signals of Coal Bed Simulation under Forced Vibration Conditions |
| title_full_unstemmed | An Experiment Monitoring Signals of Coal Bed Simulation under Forced Vibration Conditions |
| title_short | An Experiment Monitoring Signals of Coal Bed Simulation under Forced Vibration Conditions |
| title_sort | experiment monitoring signals of coal bed simulation under forced vibration conditions |
| url | http://dx.doi.org/10.1155/2015/693612 |
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