Abstract
Mine backfilling is an environment friendly solution. It has become a common practice in many underground mines around the world. Despite numerous advantages associated with this practice, efforts are needed to adequately design a retaining structure, called barricade to hold the backfill slurry in the stopes. This requires a good knowledge of the backfill pressures on the barricades. When a slurried backfill is poured in the stope, self-weight consolidation takes place with a quick generation and a slow dissipation of excess pore water pressure (PWP). When the dissipation of excess PWP advances sufficiently, effective stresses can develop in the backfill and shear stresses generate along fill-wall contacts. The shear stresses along the fill-wall contacts tend to reduce the stresses in the backfill and known as arching effect. Until now, the pressure estimation in backfilled stopes has been done mostly by considering only one of the two processes. In this paper, a solution is presented to evaluate the stresses in backfilled stopes by taking into account the self-weight consolidation and arching effect. The proposed solution is validated against numerical modeling performed with PLAXIS2D.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Bussiere B (2007) Colloquium 2004: Hydrogeotechnical properties of hard rock tailings from metal mines and emerging geoenvironmental disposal approaches. Can Geotech J 44(9):1019–1052
Gibson RE (1958) The progress of consolidation in a clay layer increasing in thickness with time. Geotechnique 8(4):171–182
Zheng J, Li L, Mbonimpa M et al (2018a) An analytical solution of Gibson’s model for estimating the pore water pressures in accreting deposition of slurried material under one-dimensional self-weight consolidation. Part I: Pervious Base Ind Geotech J 48(1):72–83
Zheng J, Li L, Mbonimpa M et al (2018b) An analytical solution of Gibson’s model for estimating pore water pressures in accreting deposition of slurried material under one-dimensional self-weight consolidation. Part II: Impervious Base Ind Geotech J 48(1):188–195
Li L, Aubertin M, Belem T (2005) Formulation of a three dimensional analytical solution to evaluate stress in backfilled vertical narrow openings. Can Geotech J 42(6):1705–1717. (with Erratum 43(3):338–339)
Li L, Aubertin M (2008) An improved analytical solution to estimate the stress state in subvertical backfilled stopes. Can Geotech J 45(10):1487–1496
Li L, Aubertin M (2009) Influence of water pressure on the stress state in stopes with cohesionless backfill. Geotech Geol Eng 27(1):1–11
Goodwin ET (1949) The evaluation of integrals of the form \( \int_{ - \infty }^{ + \infty } {f(x)e^{{ - x^{2} }} dx} \). In: Mathematical proceedings of the Cambridge philosophical society, pp 241–245. Cambridge University
Acknowledgements
The authors would like to acknowledge the financial support from the Natural Sciences and Engineering Research Council of Canada (NSERC 402318), Institut de recherche Robert- Sauvé en santé et en sécurité du travail (IRSST 2013-0029), Fonds de recherche du Québec—Nature et Technologies (FRQNT 2015-MI- 191676), and industrial partners of the Research Institute on Mines and the Environment (RIME UQAT-Polytechnique; http://rime-irme.ca/).
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2019 Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Zheng, J., Li, L. (2019). A Solution to Estimate Stresses in Backfilled Stopes by Considering Self-weight Consolidation and Arching. In: Zhan, L., Chen, Y., Bouazza, A. (eds) Proceedings of the 8th International Congress on Environmental Geotechnics Volume 3. ICEG 2018. Environmental Science and Engineering(). Springer, Singapore. https://doi.org/10.1007/978-981-13-2227-3_22
Download citation
DOI: https://doi.org/10.1007/978-981-13-2227-3_22
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-13-2226-6
Online ISBN: 978-981-13-2227-3
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)