Propagation Laws of Blasting Seismic Waves in Weak Rock Mass: A Case Study of Muzhailing Tunnel
In order to study the propagation laws of blasting vibration waves in weak rock tunnels, the longitudinal and circumferential blasting vibration tests in Muzhailing Tunnel were carried out, and the measured data were analyzed and studied using the methods of Sadov’s nonlinear regression, Fourier tra...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8818442 |
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| author | Lijun Chen Jianxun Chen Yanbin Luo Yalong Guo Yongjun Mu Daochuan Zhong Weiwei Liu Tielun Yang Weixiang Chen |
| author_facet | Lijun Chen Jianxun Chen Yanbin Luo Yalong Guo Yongjun Mu Daochuan Zhong Weiwei Liu Tielun Yang Weixiang Chen |
| author_sort | Lijun Chen |
| collection | DOAJ |
| description | In order to study the propagation laws of blasting vibration waves in weak rock tunnels, the longitudinal and circumferential blasting vibration tests in Muzhailing Tunnel were carried out, and the measured data were analyzed and studied using the methods of Sadov’s nonlinear regression, Fourier transform, and Hilbert–Huang transform (HHT) to provide a reference for the optimization of blasting design of Muzhailing Tunnel or similar weak rock tunnels. The results showed that the tangential main frequency decreases rapidly and the radial main frequency decreases slowly with the increase of proportionate charge quantity. Under a certain charge quantity, as the distance from the explosion source increases, the spectrum width of the blasting vibration frequency becomes narrower, the overall energy is more concentrated, and the vibration frequency tends to be closer to the low frequency. At a certain distance from the explosive source, the frequency of blasting vibration decreases gradually, and the amplitude of low-frequency region increases with the increase of charge quantity. The vibration velocity on the left side of the tunnel is larger than that on the right side, and the vibration velocity at the vault and the arch foot of lower bench decreases rapidly, while the vibration velocity at the arch feet of upper bench and middle bench decreases slowly. The vibration frequencies of the left arch foot of the middle bench and the right arch foot of the upper bench are higher than those of other positions, while the frequencies of the left arch foot of the upper bench are the lowest. During tunnel blasting, the energy input to the strata media is mainly concentrated in the stage of the blasting of the cut hole. The blasting has more energy input to the left arch foot of the upper bench and the tunnel vault, which is consistent with the conclusion of frequency analysis. |
| format | Article |
| id | doaj-art-da9a6c5d699944f7ab77f232fc778465 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-da9a6c5d699944f7ab77f232fc7784652025-02-03T06:45:47ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88184428818442Propagation Laws of Blasting Seismic Waves in Weak Rock Mass: A Case Study of Muzhailing TunnelLijun Chen0Jianxun Chen1Yanbin Luo2Yalong Guo3Yongjun Mu4Daochuan Zhong5Weiwei Liu6Tielun Yang7Weixiang Chen8School of Highway, Chang’an University, Xi’an 710064, Shaanxi, ChinaSchool of Highway, Chang’an University, Xi’an 710064, Shaanxi, ChinaSchool of Highway, Chang’an University, Xi’an 710064, Shaanxi, ChinaLiaoning Transportation Planning and Design Institute Co., Ltd., Shenyang 117000, Liaoning, ChinaSchool of Highway, Chang’an University, Xi’an 710064, Shaanxi, ChinaSchool of Highway, Chang’an University, Xi’an 710064, Shaanxi, ChinaSchool of Highway, Chang’an University, Xi’an 710064, Shaanxi, ChinaGansu Changda Highway Co., Ltd., Lanzhou 730030, Gansu, ChinaGansu Changda Highway Co., Ltd., Lanzhou 730030, Gansu, ChinaIn order to study the propagation laws of blasting vibration waves in weak rock tunnels, the longitudinal and circumferential blasting vibration tests in Muzhailing Tunnel were carried out, and the measured data were analyzed and studied using the methods of Sadov’s nonlinear regression, Fourier transform, and Hilbert–Huang transform (HHT) to provide a reference for the optimization of blasting design of Muzhailing Tunnel or similar weak rock tunnels. The results showed that the tangential main frequency decreases rapidly and the radial main frequency decreases slowly with the increase of proportionate charge quantity. Under a certain charge quantity, as the distance from the explosion source increases, the spectrum width of the blasting vibration frequency becomes narrower, the overall energy is more concentrated, and the vibration frequency tends to be closer to the low frequency. At a certain distance from the explosive source, the frequency of blasting vibration decreases gradually, and the amplitude of low-frequency region increases with the increase of charge quantity. The vibration velocity on the left side of the tunnel is larger than that on the right side, and the vibration velocity at the vault and the arch foot of lower bench decreases rapidly, while the vibration velocity at the arch feet of upper bench and middle bench decreases slowly. The vibration frequencies of the left arch foot of the middle bench and the right arch foot of the upper bench are higher than those of other positions, while the frequencies of the left arch foot of the upper bench are the lowest. During tunnel blasting, the energy input to the strata media is mainly concentrated in the stage of the blasting of the cut hole. The blasting has more energy input to the left arch foot of the upper bench and the tunnel vault, which is consistent with the conclusion of frequency analysis.http://dx.doi.org/10.1155/2020/8818442 |
| spellingShingle | Lijun Chen Jianxun Chen Yanbin Luo Yalong Guo Yongjun Mu Daochuan Zhong Weiwei Liu Tielun Yang Weixiang Chen Propagation Laws of Blasting Seismic Waves in Weak Rock Mass: A Case Study of Muzhailing Tunnel Advances in Civil Engineering |
| title | Propagation Laws of Blasting Seismic Waves in Weak Rock Mass: A Case Study of Muzhailing Tunnel |
| title_full | Propagation Laws of Blasting Seismic Waves in Weak Rock Mass: A Case Study of Muzhailing Tunnel |
| title_fullStr | Propagation Laws of Blasting Seismic Waves in Weak Rock Mass: A Case Study of Muzhailing Tunnel |
| title_full_unstemmed | Propagation Laws of Blasting Seismic Waves in Weak Rock Mass: A Case Study of Muzhailing Tunnel |
| title_short | Propagation Laws of Blasting Seismic Waves in Weak Rock Mass: A Case Study of Muzhailing Tunnel |
| title_sort | propagation laws of blasting seismic waves in weak rock mass a case study of muzhailing tunnel |
| url | http://dx.doi.org/10.1155/2020/8818442 |
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