SEISMIC TOMOGRAPHY - DEVELOPMENTS AND APPLICATIONS IN THE MINING AND ENGINEERING GEOLOGY

9th International Multidisciplinary Scientific GeoConference - SGEM2009, www.sgem.org, SGEM2009 Conference Proceedings/ ISBN 10: 954-91818-1-2, June 14-19, 2009, Vol. 1, 701-708 pp

ABSTRACT

Several soft-programs to reverse tomography data acquired on 2D panels, for
transmitted seismic rays, were developed. The procedures are based on three concepts:
graphic mediation of velocities (V) coupled with a system of correction factors to
reconstruct the initial V distribution (Tomography Interactive Modeling-TIM),
minimize velocities errors by applying matrix calculation (Matrix Calculus in
Tomography -MCT) and graphic-analytical uncover of velocities from the periphery to
the center of the examined panel (Velocity Delamination -VELDEL). Accuracy of these
processing techniques is analyzed in relation with the seismic array covering the sides
of the tomography polygon and with differentiation constituent velocities. Favorable
results on models encouraged applications in practical perspectives for the country’s
economy, exemplified here by measurements in Praid salt mine (100km NW of Brasov)
and regarding the degree of homogeneity of the eastern versant of Vidraru dam -
Southern Fagaras Mountains (60km N of Pitesti).

Keywords: seismic tomography, engineering geology, seismic velocity, salt, gneiss