Safety Study on Blasting Vibration of Down Tunnel in Neighboring Villages
Engineering and Applied Sciences
Volume 5, Issue 1, February 2020, Pages: 15-21
Received: Jan. 13, 2020; Accepted: Feb. 3, 2020; Published: Feb. 13, 2020
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Authors
Chunchao Chen, Faculty of Land and Resources Engineering, Kunming University of Science and Technology, Kunming, China
Zhiyu Zhang, Faculty of Land and Resources Engineering, Kunming University of Science and Technology, Kunming, China
Zihao Tao, Faculty of Land and Resources Engineering, Kunming University of Science and Technology, Kunming, China
Jiguo Zhou, Faculty of Land and Resources Engineering, Kunming University of Science and Technology, Kunming, China
Bishu Zhang, Faculty of Land and Resources Engineering, Kunming University of Science and Technology, Kunming, China
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Abstract
Blasting is an effective methods of tunnel excavation, but blasting vibration damage will occur in the construction process. In order to study the blasting vibration of the downlink tunnel, the blasting vibration of the upper part of a tunnel in yunnan was monitored The results show that the vertical vibration velocity is higher than the other two axial vibration velocity, and there is obvious elevation amplification effect in the blasting vibration propagation process. In this test condition, the impact range of blasting vibration is 22m, which will not affect the village. According to HHT analysis, the blasting vibration energy is mainly concentrated in the low-frequency interval, while the high frequency interval vibration energy is small; The instantaneous response spectrum of blasting vibration energy can reflect the number of detonators used for the maximum single-end charge, and there is a surge of energy in the process of blasting vibration energy transmission. At the same time, the expansion of the air face can effectively reduce the transfer of blasting vibration energy. The results show that the propagation of blasting vibration energy can be effectively controlled by controlling the maximum charge of explosive and increasing the blank surface.
Keywords
The Blasting Vibration, Prediction of Blasting Vibration Velocity, HHT Analysis, Time-Frequency Characteristic
To cite this article
Chunchao Chen, Zhiyu Zhang, Zihao Tao, Jiguo Zhou, Bishu Zhang, Safety Study on Blasting Vibration of Down Tunnel in Neighboring Villages, Engineering and Applied Sciences. Vol. 5, No. 1, 2020, pp. 15-21. doi: 10.11648/j.eas.20200501.13
Copyright
Copyright © 2020 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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