KAUST DepartmentEnergy Resources and Petroleum Engineering Program
Ali I. Al-Naimi Petroleum Engineering Research Center (ANPERC)
Physical Science and Engineering (PSE) Division
Online Publication Date2019-12-10
Print Publication Date2020-10
Permanent link to this recordhttp://hdl.handle.net/10754/665416
MetadataShow full item record
AbstractThe probability of failure of tailing dams and associated risks demand improvements in engineering practice. The critical state line provides a robust framework for the characterization of mine tailings. New experimental data for nonplastic platinum tailings and a large database for tailings and nonplastic soils (grain size between 2 and 500 μm) show that the critical state parameters for nonplastic tailings follow the same trends as nonplastic soils as a function of particle-scale characteristics and extreme void ratios. Critical state lines determined for extreme tailings gradations underestimate the range of critical state parameters that may be encountered in a tailings dam; in fact, mixtures with intermediate fines content exhibit the densest granular packing at critical state. The minimum void ratio emin captures the underlying role of particle shape and grain size distribution on granular packing and emerges as a valuable index property to inform sampling strategies for the assessment of spatial variability. Mineralogy does not significantly affect the intercept Γ100, but it does affect the slope λ. The friction coefficients M of tailings are similar to those of other nonplastic soils; while mineralogy does not have a significant effect on friction, more angular grains lead to higher friction coefficients.
CitationTorres-Cruz, L. A., & Santamarina, J. C. (2020). The critical state line of nonplastic tailings. Canadian Geotechnical Journal, 57(10), 1508–1517. doi:10.1139/cgj-2019-0019
SponsorsThis work was supported by the University of the Witwatersrand and King Abdullah University of Science and Technology (KAUST). G. Abelskamp edited the manuscript.
PublisherCanadian Science Publishing
JournalCanadian Geotechnical Journal
Except where otherwise noted, this item's license is described as This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.