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Contribution of SFM and ERI Methods to Assess an Underground Quarry Pillar
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Near Surface Geoscience 2015 - 21st European Meeting of Environmental and Engineering Geophysics, Sep 2015, Volume 2015, p.1 - 5
Abstract
Natural degradation of underground quarries is a major issue from an economic and public safety point of view. Electrical Resistivity Imaging (ERI) method can assess efficiently the electrical resistivity distribution inside a medium and its evolution. However, conventional 3D ERI methods are not well suited for quarry pillar assessment. Moreover, a complete 3D ERI necessitates an accurate 3D geometry. In this paper, we propose the use of cost effective SFM techniques to generate a three-dimensional medium. A new assessment methodology based on the combination of SFM and Electrical Resistivity methods is proposed. This methodology is applied to a real limestone quarry pillar. Inversion results show the key role of the accuracy of the 3D model.