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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, Li Li

Article (2019)

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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.
Subjects: 1000 Civil engineering > 1002 Geotechnical engineering (including Engineering geology)
1400 Mining and mineral processing > 1401 Mining engineering
1400 Mining and mineral processing > 1403 Rock mechanics
Department: Department of Civil, Geological and Mining Engineering
Research Center: RIME - Research Institute on Mines and the Environment 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
PolyPublie URL: https://publications.polymtl.ca/4951/
Journal Title: Advances in Civil Engineering (vol. 2019)
Publisher: Hindawi
DOI: 10.1155/2019/1802130
Official URL: https://doi.org/10.1155/2019/1802130
Date Deposited: 03 Jun 2022 15:50
Last Modified: 14 Nov 2022 12:12
Cite in APA 7: 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, 1802130 (19 pages). https://doi.org/10.1155/2019/1802130

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