Compaction-Based Analytical Stress Model for 3D Inclined Backfilled Stopes
Publication: International Journal of Geomechanics
Volume 18, Issue 4
Abstract
The evaluation of the state of stress in a backfilled stope is necessary for assessing the stability of the sides and assisting in barricade design. To date, a few analytical models have been proposed in the literature for the estimation of the earth pressures of fill material; however, these models do not consider the three-dimensional (3D) inclined-stope geometry or consolidation of the material in a passive state. In this paper, an analytical model is proposed for the estimation of earth pressures by considering pore-water pressure and the consolidation effect of the fill material for different state conditions in an inclined 3D stope. The proposed model was validated with experimental works and another analytical model. The geotechnical properties of cemented backfill material were determined as the key inputs for this model. The model was applied to estimate the vertical and horizontal stresses that may develop in a filled stope with length, width, and height of 40, 20, and 60 m, respectively, and is inclined at 75° from the horizontal. This information is useful for designing the thickness of a barricade during a filling operation.
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Published In
International Journal of Geomechanics
Volume 18 • Issue 4 • April 2018
Copyright
© 2018 American Society of Civil Engineers.
History
Received: Jan 11, 2017
Accepted: Oct 17, 2017
Published online: Jan 18, 2018
Published in print: Apr 1, 2018
Discussion open until: Jun 18, 2018
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