On relate l'effondrement d'un quartier de la mine de sel de Varangéville survenu en 1873. Les descriptions de l'époque montrent que la partie centrale du recouvrement de la mine est descendue en bloc, entraînant une couronne intensément déformée. Les piliers ont poinçonné précocement le mur imbibé de saumure, mais le toit les a retenus tant que l'extension de la mine, et donc sa raideur à la flexion restaient modérées. Le calcul numérique montre que le caractère brutal de l'effondrement peut être relié au développement d'une zone dilatante, traversant toute la couche de sel, et engendrée par le report sur le contour de la mine d'une part du poids des terrains surincombants.Mots-clés : mine de sel, chambres et piliers, dilatance, effondrement. The 1873 collapse at the Varangéville Salt Mine AbstractThe 1873 collapse of a panel of the Varangeville Salt Mine is described. The central part of the overburden dropped down as a rigid block; between this cylinder and the intact rock mass, a rock crown was severely deformed. The marly floor of the mine, which had been weathered by water, were punched by the mine pillars at an early stage; however mine roof prevented full punching as long as roof extension, thus roof bending stiffness, remained small. Numerical computations prove that the catastrophic character of the collapse can be explained by the development of a dilatant zone, crossing through the salt layers, which had formed upon the mine edge, as a part of the overburden weight was transferred to the abutment.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.