Investigation and Control of the Blasting-Induced Ground Vibration under Cold Condition
This paper focuses on the investigation and control of the blasting-induced ground vibration under cold condition. The mechanical performance and wave propagation characteristics of the frozen rock mass are quite different from that of the conventional condition. Laboratory tests were implemented to...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/6660729 |
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| _version_ | 1849692749991772160 |
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| author | Yingguo Hu Zhaowei Yang Erlei Yao Meishan Liu Yu Rao |
| author_facet | Yingguo Hu Zhaowei Yang Erlei Yao Meishan Liu Yu Rao |
| author_sort | Yingguo Hu |
| collection | DOAJ |
| description | This paper focuses on the investigation and control of the blasting-induced ground vibration under cold condition. The mechanical performance and wave propagation characteristics of the frozen rock mass are quite different from that of the conventional condition. Laboratory tests were implemented to investigate the wave impedance of rock mass in the frozen, saturated, normal, and drying states. Results reveal the longitudinal wave velocity could be enlarged by 40 percent in the frozen state. Then long-term monitoring of blasting vibration was implemented based on the blasting excavation of the Fengman hydropower station reconstruction project in the north of China. Results demonstrate the PPV and frequency both attenuate much slower when the rock mass is frozen, and the obvious turning points of PPV could be found between different temperatures, where the change of the PPV relationship happens. At last, numerical simulation of the blasting seismic wave attenuation and the response in the protected structure was implemented. The equivalent freezing simulation method was proposed and verified with the site experiment data. Results demonstrate that the attenuation coefficient decreases obviously as the frozen depth of the rock mass increases. The dynamic degree response in structure is much stronger and the maximum charge weight per delay was limited more strictly under the frozen condition. A most adverse frozen depth was determined when the charge weight per delay gets the minimum value. With the above control approaches, a total of 676 blasting was completed in Fengman hydropower station reconstruction and no case of excessive measurement could be found. |
| format | Article |
| id | doaj-art-927f12dee7514ebbb1a2721ecd23fc0c |
| institution | DOAJ |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-927f12dee7514ebbb1a2721ecd23fc0c2025-08-20T03:20:37ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/66607296660729Investigation and Control of the Blasting-Induced Ground Vibration under Cold ConditionYingguo Hu0Zhaowei Yang1Erlei Yao2Meishan Liu3Yu Rao4Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Changjiang River Scientific Research Institute, Wuhan 430010, Hubei, ChinaKey Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Changjiang River Scientific Research Institute, Wuhan 430010, Hubei, ChinaKey Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Changjiang River Scientific Research Institute, Wuhan 430010, Hubei, ChinaKey Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Changjiang River Scientific Research Institute, Wuhan 430010, Hubei, ChinaKey Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Changjiang River Scientific Research Institute, Wuhan 430010, Hubei, ChinaThis paper focuses on the investigation and control of the blasting-induced ground vibration under cold condition. The mechanical performance and wave propagation characteristics of the frozen rock mass are quite different from that of the conventional condition. Laboratory tests were implemented to investigate the wave impedance of rock mass in the frozen, saturated, normal, and drying states. Results reveal the longitudinal wave velocity could be enlarged by 40 percent in the frozen state. Then long-term monitoring of blasting vibration was implemented based on the blasting excavation of the Fengman hydropower station reconstruction project in the north of China. Results demonstrate the PPV and frequency both attenuate much slower when the rock mass is frozen, and the obvious turning points of PPV could be found between different temperatures, where the change of the PPV relationship happens. At last, numerical simulation of the blasting seismic wave attenuation and the response in the protected structure was implemented. The equivalent freezing simulation method was proposed and verified with the site experiment data. Results demonstrate that the attenuation coefficient decreases obviously as the frozen depth of the rock mass increases. The dynamic degree response in structure is much stronger and the maximum charge weight per delay was limited more strictly under the frozen condition. A most adverse frozen depth was determined when the charge weight per delay gets the minimum value. With the above control approaches, a total of 676 blasting was completed in Fengman hydropower station reconstruction and no case of excessive measurement could be found.http://dx.doi.org/10.1155/2021/6660729 |
| spellingShingle | Yingguo Hu Zhaowei Yang Erlei Yao Meishan Liu Yu Rao Investigation and Control of the Blasting-Induced Ground Vibration under Cold Condition Shock and Vibration |
| title | Investigation and Control of the Blasting-Induced Ground Vibration under Cold Condition |
| title_full | Investigation and Control of the Blasting-Induced Ground Vibration under Cold Condition |
| title_fullStr | Investigation and Control of the Blasting-Induced Ground Vibration under Cold Condition |
| title_full_unstemmed | Investigation and Control of the Blasting-Induced Ground Vibration under Cold Condition |
| title_short | Investigation and Control of the Blasting-Induced Ground Vibration under Cold Condition |
| title_sort | investigation and control of the blasting induced ground vibration under cold condition |
| url | http://dx.doi.org/10.1155/2021/6660729 |
| work_keys_str_mv | AT yingguohu investigationandcontroloftheblastinginducedgroundvibrationundercoldcondition AT zhaoweiyang investigationandcontroloftheblastinginducedgroundvibrationundercoldcondition AT erleiyao investigationandcontroloftheblastinginducedgroundvibrationundercoldcondition AT meishanliu investigationandcontroloftheblastinginducedgroundvibrationundercoldcondition AT yurao investigationandcontroloftheblastinginducedgroundvibrationundercoldcondition |