Designing steel for ground-support applications in underground mines

CIM Journal, Vol. 7, No. 1, 2016

M. R. P. Snow
Queen’s University, Kingston, Ontario, Canada

http://dx.doi.org/10.15834/cimj.2016.10
Résumé Le présent article décrit les conditions géotechniques qui existent fréquemment dans les mines souterraines de roches dures et les défis que cela pose pour le soutien de terrain en acier, plus spécifiquement les boulons d’ancrage utilisés dans ces environnements. Un modèle est proposé dans lequel les contraintes in situ et les classifications de la masse rocheuse (selon la classification de la masse rocheuse de Bieniawski) servent de base pour la détermination des propriétés désirées pour l’acier des boulons d’ancrage utilisés. En se basant sur les spécifications de boulonnage de l’ASTM F432, les propriétés minimales recommandées pour l’acier sont définies pour trois plages de niveaux de contraintes in situ, chacune avec sa propre plage de six valeurs de classification de la masse rocheuse (RMR). Un traitement thermique pour l’acier peut être spécifié une fois que ces propriétés minimales pour l’acier sont connues.
Mots clés : Acier, American Society for Testing and Materials (ASTM), Classification de la masse rocheuse (RMR), boulons d’ancrage, géotechnique, in situ, soutien de terrain, traitement thermique
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