TY - JOUR
T1 - Contribution of electrical tomography methods in geotechnical investigations at Mavropigi lignite open pit mine, Northern Greece
AU - Hamdan, Hamdan
AU - Andronikidis, Nikos
AU - Kritikakis, George
AU - Economou, Nikos
AU - Agioutantis, Zacharias
AU - Schilizzi, Paul
AU - Steiakakis, Chrysanthos
AU - Papageorgiou, Christodoulos
AU - Tsourlos, Panagiotis
AU - Vargemezis, George
AU - Vafidis, Antonis
PY - 2014/9
Y1 - 2014/9
N2 - In this paper, the application of 2D and 3D electrical resistivity methods in geotechnical investigations is explored through a case study in Northern Greece. These two methods were employed at a lignite surface mining operation where fracture zones and discontinuities have been recently observed close to the pit boundaries. The main aim of the geophysical survey was to estimate the inclination of the contact between the Neogene and Schist/Carbonate formations near the southern limits of the pit, as well as to estimate the thickness of the carbonate rocks on top of the Schist formations to evaluate the stability of the southern slopes. Synthetic data were initially generated to help plan an efficient electrical tomography survey, in a region with complex geology and irregular terrain. Three configurations (Wenner-Schlumberger and dipole-dipole or pole-dipole) proved essential in such conditions and helped improving the resolution of the resistivity section. The sections were then calibrated by boreholes. Finally, the geophysical survey provided invaluable data regarding the geometry of the bedrock and possible faults, which was essential for the slope stability calculations.
AB - In this paper, the application of 2D and 3D electrical resistivity methods in geotechnical investigations is explored through a case study in Northern Greece. These two methods were employed at a lignite surface mining operation where fracture zones and discontinuities have been recently observed close to the pit boundaries. The main aim of the geophysical survey was to estimate the inclination of the contact between the Neogene and Schist/Carbonate formations near the southern limits of the pit, as well as to estimate the thickness of the carbonate rocks on top of the Schist formations to evaluate the stability of the southern slopes. Synthetic data were initially generated to help plan an efficient electrical tomography survey, in a region with complex geology and irregular terrain. Three configurations (Wenner-Schlumberger and dipole-dipole or pole-dipole) proved essential in such conditions and helped improving the resolution of the resistivity section. The sections were then calibrated by boreholes. Finally, the geophysical survey provided invaluable data regarding the geometry of the bedrock and possible faults, which was essential for the slope stability calculations.
KW - 2D and 3D Electrical tomography
KW - Geotechnical investigation
KW - Mavropigi
KW - Slope stability
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U2 - 10.1007/s12665-014-3063-6
DO - 10.1007/s12665-014-3063-6
M3 - Article
AN - SCOPUS:84892868577
SN - 1866-6280
VL - 72
SP - 1589
EP - 1598
JO - Environmental Earth Sciences
JF - Environmental Earth Sciences
IS - 5
ER -