Generating Behaviors of Strong Tremors and Experimental Study of Rockburst-Triggering Criterion
Numerous tremors occur during excavation and mining periods in coal mines, and low-energy tremors often occur before strong tremors. In addition, it is found that not all strong tremors cause rockbursts. Therefore, generating behaviors of strong tremors and the triggering criterion for the occurrenc...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2019/6319612 |
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| author | Guifeng Wang Feng Jin Siyuan Gong Linming Dou Chaojun Fan Wu Cai Xiaoyuan Yuan |
| author_facet | Guifeng Wang Feng Jin Siyuan Gong Linming Dou Chaojun Fan Wu Cai Xiaoyuan Yuan |
| author_sort | Guifeng Wang |
| collection | DOAJ |
| description | Numerous tremors occur during excavation and mining periods in coal mines, and low-energy tremors often occur before strong tremors. In addition, it is found that not all strong tremors cause rockbursts. Therefore, generating behaviors of strong tremors and the triggering criterion for the occurrence of the rockburst must be investigated. In this study, generating behaviors of strong tremors were inferred by velocity tomograms and energy density clouds. An innovative facility capable of applying dynamic disturbance to roadway models was developed to study the triggering criterion for rockbursts. Velocity tomograms indicated that the stress concentration extended to the syncline region with the advance of the coalface. High-energy-density clouds expanded rapidly and regularly in some areas that were parts of the high-velocity region, indicating that the stress increased rapidly in these areas, until strong tremors took place nearby. AE activities suggested that the modelled roadway offered good resistance as the dynamic loading energy grew from 29.4 J to 117.6 J. Then, sharp AE activity at the dynamic loading energy of 147 J indicated the ultimate shock resistance of the roadway was almost reached. Finally, bursting failure of the modelled roadway was observed at a dynamic loading energy of 176.4 J. |
| format | Article |
| id | doaj-art-1b482ca501ec4136b9cbf2d35a164471 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-1b482ca501ec4136b9cbf2d35a1644712025-02-03T01:23:02ZengWileyShock and Vibration1070-96221875-92032019-01-01201910.1155/2019/63196126319612Generating Behaviors of Strong Tremors and Experimental Study of Rockburst-Triggering CriterionGuifeng Wang0Feng Jin1Siyuan Gong2Linming Dou3Chaojun Fan4Wu Cai5Xiaoyuan Yuan6State Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaDepartment of Energy and Mineral Engineering, G3 Center and Energy Institute, The Pennsylvania State University, University Park, State College, PA 16802, USAState Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaNumerous tremors occur during excavation and mining periods in coal mines, and low-energy tremors often occur before strong tremors. In addition, it is found that not all strong tremors cause rockbursts. Therefore, generating behaviors of strong tremors and the triggering criterion for the occurrence of the rockburst must be investigated. In this study, generating behaviors of strong tremors were inferred by velocity tomograms and energy density clouds. An innovative facility capable of applying dynamic disturbance to roadway models was developed to study the triggering criterion for rockbursts. Velocity tomograms indicated that the stress concentration extended to the syncline region with the advance of the coalface. High-energy-density clouds expanded rapidly and regularly in some areas that were parts of the high-velocity region, indicating that the stress increased rapidly in these areas, until strong tremors took place nearby. AE activities suggested that the modelled roadway offered good resistance as the dynamic loading energy grew from 29.4 J to 117.6 J. Then, sharp AE activity at the dynamic loading energy of 147 J indicated the ultimate shock resistance of the roadway was almost reached. Finally, bursting failure of the modelled roadway was observed at a dynamic loading energy of 176.4 J.http://dx.doi.org/10.1155/2019/6319612 |
| spellingShingle | Guifeng Wang Feng Jin Siyuan Gong Linming Dou Chaojun Fan Wu Cai Xiaoyuan Yuan Generating Behaviors of Strong Tremors and Experimental Study of Rockburst-Triggering Criterion Shock and Vibration |
| title | Generating Behaviors of Strong Tremors and Experimental Study of Rockburst-Triggering Criterion |
| title_full | Generating Behaviors of Strong Tremors and Experimental Study of Rockburst-Triggering Criterion |
| title_fullStr | Generating Behaviors of Strong Tremors and Experimental Study of Rockburst-Triggering Criterion |
| title_full_unstemmed | Generating Behaviors of Strong Tremors and Experimental Study of Rockburst-Triggering Criterion |
| title_short | Generating Behaviors of Strong Tremors and Experimental Study of Rockburst-Triggering Criterion |
| title_sort | generating behaviors of strong tremors and experimental study of rockburst triggering criterion |
| url | http://dx.doi.org/10.1155/2019/6319612 |
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