Stabilité de la surface après l'exploitation totale du charbon et l'arrêt des pompages d'exhaure minière

Abstract : Coal mines experience in France and in Western Europe for more than 50 years bas shown that the most subsidence (90%) occurs during the extraction of panels. The subsidence is almost stabilised within 2 years by the end of the extraction. Beyond this period, the movements are no longer significant because they can 't be distinguished from the natural ground movements, and can 't be measured though levelling, even of high precision. The increase of water level when pumping is stopped can induce a centimetric rise of ground level, function of works depth, thickness of extracted seam (layer) and increase of the underground water level. The studies of Bekendam and Pôttgens (1985, 2000) and ofFenk (1997) concerning respectively minings in the Netherlands and in Germany highlighted this phenomenon. The observations mode in Lorraine in the sector of Faulquemont, where the works flooding has been stabilised, give similar results (Degas, 2001) (Wojtkowiak, 2001). No consequence on buildings and surface infrastructures due to this phenomenon has been noticed.
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  • INERIS : PU-2003-014

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Marie Degas, Francis Wojtkowiak, M. Metz, M. Branchet. Stabilité de la surface après l'exploitation totale du charbon et l'arrêt des pompages d'exhaure minière. Colloque International Après-mine 2003, Feb 2003, Nancy, France. pp.NC. ⟨ineris-00972409⟩

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