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A Study of Seismic Wave Propagation for Tunnel Exploration  

Suh, Baek-Soo (Division of Environmental of and Geosystem Engineering, Kangwon National Univeristy)
Oh, Seok-Hoon (Division of Environmental of and Geosystem Engineering, Kangwon National Univeristy)
Sohn, Kwon-Ik (Division of Industrial Engineering, Kangwon National University)
Publication Information
Journal of the Korean earth science society / v.27, no.5, 2006 , pp. 539-547 More about this Journal
Abstract
The activity of the seismic wave propagation around the cavity is investigated for the exact inversion of the crosshole tomography data, in order to understand the possibility of the existence inside the underground cavity. It is found that the adequate frequency range for the tunnel investigation is about 2 kHz to 5 kHz, and the grid space should be set up to 1/10 of the wavelength. The propagation of the seismic wave near the cavity may go through or detour the cavity according to the seismic velocity inside the cavity. The detouring wave propagates with the seismic velocity of mother rock in spite of the velocity of inside of the cavity. The smaller the velocity difference is between the mother rock and cavity, the more frequent penetration of the seismic wave through the cavity appears.
Keywords
cavity; inversion; wave propagation; wavelength; seismic velocity;
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