Détection de carrières souterraines par sismique haute résolution à Annet-sur-Marne (France)Underground cavities detection by using high resolution seismics at Annet-sur-Marne (France) |
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| Authors: | Gilles Grandjean Guy Sénéchal Adnand Bitri Jean-Baptiste Daban |
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| Institution: | 1. BRGM, Aménagement et risques naturels, BP 6009, 45060 Orléans, France;2. UMR 5831, Imagerie géophysique, IPRA, université de Pau et des pays de l''Adour, 64000 Pau, France |
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| Abstract: | Seismic methods were tested to detect underground cavities in the surroundings of Annet-sur-Marne (Seine-et-Marne, France). Cavities are located in three Ludian gypsum layers, between 30 and 80 m in depth. A high resolution seismic profile 450 m long was carried out so that the first third and the other part are respectively above non-exploited and exploited areas. Data processing highlights a series of reflections related to the marl–gypsum interfaces in the non-exploited area, while these reflections disappear in the exploited area. With the help of numerical simulations, this feature is interpreted as a disorganisation of wave fronts reflected on interfaces because of the presence of cavities. To cite this article: G. Grandjean et al., C. R. Geoscience 334 (2002) 441–447. |
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| Keywords: | seismics cavities detection modelling Annet-sur-Marne France sismique réflexion cavités détection modélisation Annet-sur-Marne France Géophysique interne Internal Geophysics |
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