An analytical solution for estimating the stresses in vertical backfilled stopes based on a circular arc distribution

Auteurs

El-Mustapha Jaouhar, Research Institute on Mines and Environment (RIME UQAT-Polytechnique), Canada, Department of Civil, Geological and Mining Engineering, École Polytechnique de Montréal, C.P. 6079, Succursale Centre-Ville, Montréal, H3C 3A7, QC, Canada
Li Li, Research Institute on Mines and Environment (RIME UQAT-Polytechnique), Canada, Department of Civil, Geological and Mining Engineering, École Polytechnique de Montréal, C.P. 6079, Succursale Centre-Ville, Montréal, H3C 3A7, QC, Canada
Michel Aubertin, Research Institute on Mines and Environment (RIME UQAT-Polytechnique), Canada, Department of Civil, Geological and Mining Engineering, École Polytechnique de Montréal, C.P. 6079, Succursale Centre-Ville, Montréal, H3C 3A7, QC, Canada

Type de document

Études primaires

Année de publication

2018

Langue

Anglais

Titre de la revue

Geomechanics and Engineering

Première page

889

Dernière page

898

Résumé

Backfilling of mine stopes with waste rocks or tailings is commonly done to enhance ground stability. It is also an alternative for mining wastes disposal. A successful application of underground backfilling requires an accurate evaluation of the stress distribution in stopes. Over the years, various analytical solutions have been proposed to assess these stresses. Most of them were based on the arching theory, considering uniform stresses across horizontal layer elements. The vertical and horizontal stresses in vertical stopes are principal stresses only along the vertical center line, but not close to the walls where there is rotation of the principal stresses. A few solutions use arc layer elements that follow the iso-contours of the minor principal stresses, based on numerical solutions. In this paper, a modified analytical solution is developed for the stresses in vertical backfilled stopes, considering a circular arc distribution. The proposed solution is calibrated with a few numerical modeling results and then validated by additional numerical simulations under different conditions. © 2018 Techno-Press, Ltd.

Mots-clés

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

Numéro de projet IRSST

n/a

Citation recommandée

Jaouhar, E.-M., Li, L. et Aubertin, M. (2018). An analytical solution for estimating the stresses in vertical backfilled stopes based on a circular arc distribution. Geomechanics & engineering, 15(3), 889-898. https://doi.org/10.12989/gae.2018.15.3.889