Propagation Laws of Blasting Seismic Waves in Weak Rock Mass: A Case Study of Muzhailing Tunnel
Joint Authors
Chen, Weixiang
Liu, Weiwei
Luo, Yanbin
Yang, Tielun
Chen, Jianxun
Guo, Yalong
Mu, Yongjun
Zhong, Daochuan
Chen, Lijun
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-05-25
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Abstract EN
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.
American Psychological Association (APA)
Chen, Lijun& Chen, Jianxun& Luo, Yanbin& Guo, Yalong& Mu, Yongjun& Zhong, Daochuan…[et al.]. 2020. Propagation Laws of Blasting Seismic Waves in Weak Rock Mass: A Case Study of Muzhailing Tunnel. Advances in Civil Engineering،Vol. 2020, no. 2020, pp.1-15.
https://search.emarefa.net/detail/BIM-1123198
Modern Language Association (MLA)
Chen, Lijun…[et al.]. Propagation Laws of Blasting Seismic Waves in Weak Rock Mass: A Case Study of Muzhailing Tunnel. Advances in Civil Engineering No. 2020 (2020), pp.1-15.
https://search.emarefa.net/detail/BIM-1123198
American Medical Association (AMA)
Chen, Lijun& Chen, Jianxun& Luo, Yanbin& Guo, Yalong& Mu, Yongjun& Zhong, Daochuan…[et al.]. Propagation Laws of Blasting Seismic Waves in Weak Rock Mass: A Case Study of Muzhailing Tunnel. Advances in Civil Engineering. 2020. Vol. 2020, no. 2020, pp.1-15.
https://search.emarefa.net/detail/BIM-1123198
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1123198