Determination of Rock Mass Structure near Tunnel by Phase Velocities of Seismic Surface Waves
A. S. Serdyukov1,2, R. A. Efremov1,2, A. V. Yablokov1,2, M. N. Kormin3, K. B. Akulov3
1Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
3BAMTONNEL Science and Research Center, Novosibirsk, Russia
Keywords: Rock mass, underground structures, in-situ observations, shallow seismics, condition monitoring, surface waves
Abstract
The field research of the geomechanical behavior of rock mass was carried out in the neighborhood of an abandoned railway tunnel by means of multi-channel analysis of seismic surface waves. For the interpretation of the results, the spectral dispersion images of waves along the tunnel were selected and analyzed. That made it possible to obtain the velocity patterns of waves in enclosing rock mass, and to identify the low-velocity zones in it. The results prove the applicability of the method of determining structure and condition of adjacent rock mass surrounding underground structures.
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