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Principes de traitement d'anciens ouvrages miniers débouchant en surface

Abstract : Former mining openings (shafts, adits and declines close to the surface), which are still open or simply covered up, present obvious hazards for the people and human activities near-by. Differents procedures are implemented to secure such openings, but the self-supporting plug technique is often the most appropriate method. Self supporting plugs are concrete structures implemented within the shaft and which rest on its lining to ensure their own stability. The plug must be able to bear its own weight, support an excessive load and resist to a possible underlying backfill column untampling. The principle of a plug in an adit is quite similar to that developped for shafts. However, the adit plug must also strengthen the rock mass at the rear of the opening over a sufficient area to prevent any sinkhole formation or subsidence. According to the type of overburden and slope of galleries, we can depend on rubble self-swelling, or on an auto-stabilization of the disorder with the forming of a steady vault within the overburden, to guarantee the long term stability of the galleries.
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  • HAL Id : ineris-00972173, version 1
  • INERIS : PU-1999-054

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Francis Wojtkowiak, Christophe Didier. Principes de traitement d'anciens ouvrages miniers débouchant en surface. 9. Congrès International de Mécanique des Roches, Aug 1999, Paris, France. pp.25-30. ⟨ineris-00972173⟩

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