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2019-09-18 - Colloque/Article dans les actes avec comité de lecture - Anglais - 8 page(s)

Descamps Fanny , Danis Delphine, Meessen Kevin, Tshibangu Katshidikaya , "Influence of an open-pit quarry on the stability of an underground cavity" in 14th International Congress on Rock Mechanics and Rock Engineering (ISRM 2019), Foz do Iguassu, Brésil, 2019

  • Codes CREF : Mécanique des roches (DI1418), Travaux souterrains (DI2613), Exploitation des mines et carrières (DI2320)
  • Unités de recherche UMONS : Génie Minier (F408)
  • Instituts UMONS : Institut des Sciences et du Management des Risques (Risques)
Texte intégral :

Abstract(s) :

(Anglais) The Trou Loulou is an old underground soft carbonate quarry located in Eastern Belgium. This shallow depth room-and-pillar quarry was mined out from the 16th century for building stone. Now, it is considered as a cultural heritage. In the same area, an open-pit quarry is currently mining carbonated rocks for cement production. The Trou Loulou is located in the extension of this open-pit quarry. Therefore, a stability study was required for determining the security distance between both sites in order to preserve this heritage when the open-pit comes closer to it. In this paper, we first describe the geological context. A conceptual model is derived from 2D and 3D surveying of the site. In situ and laboratory mechanical characterizations are performed and a stability analysis is proposed using 2D finite element modelling. Progressive simulation of the open-pit quarry shows the occurrence of localized roof failure.