Stability analyses of vertically exposed cemented backfill: A revisit to Mitchell's physical model tests

Auteurs

Guangsheng Liu, School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China, Department of Civil, Geological and Mining Engineering, Ecole Polytechnique de Montreal, Montreal, H3C3A7, Canada, Beijing General Research Institute of Mining and Metallurgy, Beijing, 100160, China
Li Li, Department of Civil, Geological and Mining Engineering, Ecole Polytechnique de Montreal, Montreal, H3C3A7, Canada
Xiaocong Yang, Beijing General Research Institute of Mining and Metallurgy, Beijing, 100160, China
Lijie Guo, Beijing General Research Institute of Mining and Metallurgy, Beijing, 100160, China

Type de document

Études primaires

Année de publication

2016

Langue

Anglais

Titre de la revue

International Journal of Mining Science and Technology

Première page

1135

Dernière page

1144

Résumé

Mitchell's solution is commonly used to determine the required strength of vertically exposed cemented backfill in mines. Developed for drained backfill, Mitchell model assumed a zero friction angle for the backfill. Physical model tests were performed. Good agreements were obtained between the required strengths predicted by the analytical solution and experimental results. However, it is well-known that zero friction angle can only be possible in terms of total stresses when geomaterials are submitted to unconsolidated and undrained conditions. A revisit to Mitchell's physical model tests reveals that both the laboratory tests performed for obtaining the shear strength parameters of the cemented backfill and the box stability tests were conducted under a condition close to undrained condition. This explains well the good agreement between Mitchell's solution and experimental results. Good agreements are equally obtained between Mitchell's experimental results and FLAC3D numerical modeling of short-term stability analyses of exposed cemented backfill. © 2016

Mots-clés

Exploitation avec remblayage, Stowing and filling, Concentration de tensions, Stress concentration, Formation de voûtes, Arching

Numéro de projet IRSST

2013-0029

Citation recommandée

Liu, G., Li, L., Yang, X. et Guo, L. (2016). Stability analyses of vertically exposed cemented backfill: A revisit to Mitchell’s physical model tests. International Journal of Mining Science and Technology, 26(6), 1135-1144. https://doi.org/10.1016/j.ijmst.2016.09.024