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Effect of drainage and consolidation on the pore water pressures and total stresses within backfilled stopes and on barricades

El Mustapha Jaouhar and Li Li

Article (2019)

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Cite this document: Jaouhar, E. M. & Li, L. (2019). Effect of drainage and consolidation on the pore water pressures and total stresses within backfilled stopes and on barricades. Advances in Civil Engineering, 2019. doi:10.1155/2019/1802130
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Abstract

The pore water pressures (PWPs) and total stresses during the placement of a slurried backfill in underground mine stopes are the key parameters for the design of barricades, built to retain the backfill in the stopes. They can be affected by the drainage and consolidation of the backfill. Over the years, several studies have been reported on the pressure and stresses in backfilled stopes by accounting for the drainage and consolidation. Most of them focused on the pressure and stresses in the stopes, few specifically on the barricades. The effect of the number of draining holes commonly installed through the barricade has never been studied. In this paper, the influence of hydraulic properties and filling rate of the backfill, stope size, barricade location, and number of draining holes is systematically investigated with numerical simulations. The results show that the stresses in the backfilled stope and on the barricade largely depend on the filling rate, hydraulic conductivity, and Young’s modulus of the backfill. The draining holes can significantly decrease the PWP, but only slightly the total stresses on the barricades in short term.

Open Access document in PolyPublie
Subjects: 1000 Génie civil > 1002 Géotechnique (y compris Génie géologique)
1400 Génie minier et minéral > 1401 Génie minier
1400 Génie minier et minéral > 1403 Mécanique des roches
Department: Département des génies civil, géologique et des mines
Research Center: IRME - Institut de recherche en mines et environnement UQAT-Polytechnique
Funders: CRSNG/NSERC, Institut de Recherche Robert-Sauvé en Santé et en Sécurité du Travail, Fonds de recherche du Quebec - Nature et technologies
Grant number: NSERC 402318, IRSST 2013-0029, 2015-MI-191676
Date Deposited: 03 Jun 2022 15:50
Last Modified: 04 Jun 2022 01:20
PolyPublie URL: https://publications.polymtl.ca/4951/
Document issued by the official publisher
Journal Title: Advances in Civil Engineering (vol. 2019)
Publisher: Hindawi
Official URL: https://doi.org/10.1155/2019/1802130

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