1. Comparative study on tunnel blast-induced vibration for the underground cavern group
- Author
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Qingjun Zuo, Guangjin Liu, Li Wu, Chao Zhang, Yunsi Liu, and Yaxiong Peng
- Subjects
Astrophysics::High Energy Astrophysical Phenomena ,0208 environmental biotechnology ,Soil Science ,02 engineering and technology ,Vibration attenuation ,010501 environmental sciences ,01 natural sciences ,Seismic wave ,hemic and lymphatic diseases ,Environmental Chemistry ,Geotechnical engineering ,0105 earth and related environmental sciences ,Earth-Surface Processes ,Water Science and Technology ,Global and Planetary Change ,Attenuation ,Geology ,Excavation ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,Quantitative Biology::Genomics ,Pollution ,020801 environmental engineering ,Vibration ,Underground gas storage ,Underground cavern ,Intensity (heat transfer) - Abstract
Seismic wave induced by blasting excavation of tunnel may exert adverse effects to the surrounding rock. To study the different characteristics and attenuation of blast-induced vibration in the blasting tunnel and adjacent tunnel, field blasting tests are carried out to record velocity–time histories during blasting in Wanhua Underground Gas Storage. The characteristics and attenuation of vibration velocity and energy are presented based on the field data. And the dynamic finite-element model is established to further study the vibration attenuation law. Results demonstrate that PPV and vibration energy of the adjacent tunnel is greater than that in the blasting tunnel and attenuates more readily when monitoring points are near the blasting area. The dominant frequencies of the adjacent tunnel are higher than that in the blasting tunnel at three orthogonal directions. Adopting vibration energy as the evaluation index of seismic intensity, the fitting formula has favorable prediction accuracy, which will provide more accurate guidance for controlling the adverse effects of tunnel blasting.
- Published
- 2021