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On the Particle Vibration Rule of Rock Surrounding a Deeply Buried Circular Tunnel Under a Blasting Seismic Wave
(1 School of Civil Engineering, HuaQiao University, Quanzhou 362021; 2 Engineering Research Center of Rock-Soil Drilling and Excavation and Protection, China University of Geosciences, Wuhan 430074)
Abstract Blasting-induced seismic waves may cause dynamic responses in adjacent tunnels and affect their safety and stability. With numerical simulation, the interaction between a P wave (Seismic Wave) and adjacent circular tunnels was analyzed, and the distribution rule of particle vibration under different working conditions was studied. The results show that when the stress wave is passing through the circular tunnel, particle vibration direction may be slightly deflected near the tunnel wall and the vibration velocity may be greater or less than that of the vibration source, which has an obvious scaling effect. Additionally, the vibration frequency, tunnel dimensions, surrounding rock properties, and wavelength-diameter ratio have a great influence on the scaling effect of the particle vibration.
Abstract：
Blasting-induced seismic waves may cause dynamic responses in adjacent tunnels and affect their safety and stability. With numerical simulation, the interaction between a P wave (Seismic Wave) and adjacent circular tunnels was analyzed, and the distribution rule of particle vibration under different working conditions was studied. The results show that when the stress wave is passing through the circular tunnel, particle vibration direction may be slightly deflected near the tunnel wall and the vibration velocity may be greater or less than that of the vibration source, which has an obvious scaling effect. Additionally, the vibration frequency, tunnel dimensions, surrounding rock properties, and wavelength-diameter ratio have a great influence on the scaling effect of the particle vibration.
吕Zhen-Li-1 ,
Sun-Jin-Shan-2,
Zuo-Chang-Qun-2
.On the Particle Vibration Rule of Rock Surrounding a Deeply Buried Circular Tunnel Under a Blasting Seismic Wave[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(1): 38-44
2014, Vol. 51 