<title>Near-surface 3D visualization of underground structures by means of seismic holography</title>

Abstract

The records of the acoustical holography imaging of 60 cm concrete cube model have been taken with the predetermined model lead intrusions. Both phase and amplitude holograms were obtained. Their numerical reconstmction enabled to visualize the cross-shaped structure of this model intrusion. The records for seismic imaging of near-surface objects were taken in the region of Barbara Experimental Mine, Mikolow, Upper Silesia region, Poland. The method of seismic transmission holography was used. The explosives were detonated at one point on the depth of 40 m and signals were recorded on the surface lattice of 21 x 21 points on 50m square. These signals were further processed to obtain phase and amplitude holographic data. The seismic holograms synthesised in such a way were then numerically reconstructed. The Z-shaped image of the part of mine's gallery on the depth of 20 m was obtained.

Investigation of model based beamforming and Bayesian inversion signal processing methods for seismic localization of underground sources

“…In this paper, we focus on the active seismic detection method, [1][2][3][4][5][6][7][8][9] which exploits mechanical properties of underground structure and the subsurface soil layer. To detect subsurface structures, a source at a known location excites the ground surface producing a seismic wave that travels through the soil to interact with the underground objects.…”