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Geophysical detection of underground cavities

Abstract : In this paper, we present a synthesis of the geophysical investigations conducted on experimental sites selected in the Lorraine salt basin and Haute-Normandie marlpits. These investigations were carried out in the frame of a partnership (scientific and industrial) research program on cavities detection and characterization using techniques of high resolution seismic, microgravity and electric resistivity. The objective of the research is three folds: (1) to develop and optimize P and S seismic vibratory sources with an enhanced procedure of generation and optimization of sweeps (2) for each technique, to define the privileged application field and limitations regarding the general context of the considered site (3) to progress in the joint interpretations of the geophysical data. Despite the good quality of the data, the results evidence the complexity in the interpretation of the geophysical response in cavities environment due mainly to the compromise between the resolution and the ratio depth/dimension of the cavities, and the nature of the filling (brine, water, air). In the case of the marlpit mines, the corresponding geophysical anomalies could be correlated to the exact position of the marlpit known according to the archive records. Drilling campaign has confirmed a local collapse of the marlpit identified on the only High Resolution Seismic data
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  • HAL Id : ineris-00973287, version 1
  • INERIS : EN-2008-033


Lynda Driad-Lebeau, Bogdan Piwakowski, Peter Styles, Bernard Bourgeois, Isabelle Contrucci. Geophysical detection of underground cavities. Symposium Post-Mining 2008, Feb 2008, Nancy, France. pp.NC. ⟨ineris-00973287⟩



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