Modeling Desiccating Behavior of Mine Tailings
Publication: Journal of Geotechnical Engineering
Volume 118, Issue 4
Abstract
A one‐dimensional model of the sedimentation and desiccation of high‐clay‐content, subaerially deposited tailings is described. The approach is semi‐empirical and predicts average density and water content of a layer of tailings during sedimentation, first‐stage evaporation, and second‐stage evaporation, during which desiccation occurs. The method employs both geomechanical and soil physics principles and allows for varying evaporation, varying rainfall, and variation of initial height and solids content. Five tailings are analyzed, and model parameters are determined for each. Comparisons of recent experimental field data and the predictive model show good agreement. The laboratory equipment developed to provide parameters for analysis and methods used to obtain model parameters for other tailings are described. The model allows the effects of different initial layer depths, different initial water contents, and different available evaporation potentials to be compared with total drying time and resulting final dry density. Some examples of this are shown.
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References
1.
Black, T. A., Gardner, W. R., and Thurtell, G. W. (1969). “The prediction of evaporation, drainage and soil water storage for a bare soil.” Soil Sci. Soc. Am. Proc, 33, 655–660.
2.
Carrier, W. D., Bromwell, L. G., and Somogyi, F. (1983). “Design capacity of slurried mineral waste ponds.” J. Geotech. Engrg., ASCE, 109(5), 699–716.
3.
Concha, F., and Bustos, M. C. (1987). “A modification of the Kynch theory of sedimentation.” AIChE J., 33(2), 312–315.
4.
Covey, W. (1963). “Mathematical study of the first stage of drying of a moist soil.” Soil Sci. Soc. Am. Proc, 21, 130–134.
5.
Fell, R. (1988). “Mine tailings, dispersants and flocculants.” Proc., ASCE Geotechnical Speciality Conf. on Fill Structures, ASCE, New York, N.Y., 711–719.
6.
Gardner, W. R. (1959). “Solutions of the flow equation for drying soils and other porous media.” Soil Sci. Soc. Am. Proc., 9, 183–187.
7.
Gardner, W. R., and Hillel, D. I. (1962). “The relation of external evaporative conditions to the drying of soils.” J. Geophys. Res., 67(11), 4319–4325.
8.
Gibson, R. E., Schiffman, R. L., and Cargill, K. W. (1981). “The theory of one‐dimensional consolidation of saturated clays, II. Finite nonlinear consolidation of thick homogeneous layers.” Can. Geotech. J., 18, 280–293.
9.
Guerra, F. (1978). “Controlling the phreatic surface.” Tailings disposal today, Miller Freeman Publications, Denver, Colo., 292–326.
10.
Hamblin, A. P. (1981). “Filter paper method for routine measurement of field water potential.” J. Hydr., 53, 355–360.
11.
Howell, T. A., Phene, C. J., and Meek, D. W. (1983). “Evaporation from screened class A pans in a semi‐arid climate.” Agri. Meteor., 29, 111–124.
12.
Idso, S. B., Reginato, R. J., and Jackson, R. D. (1979). “Calculation of evaporation during the three stages of soil drying.” Water Resour. Res., 15(2), 487–488.
13.
Jalota, S. K., Prihar, S. S., and Gill, K. S. (1988). “Modified square root of time relation to predict evaporation trends from bare soil.” Aust. J. Soil Res., 26, 281–288.
14.
Kynch, G. J. (1952). “A theory of sedimentation.” Trans. of the Faraday Soc., 48, 166–176.
15.
McRoberts, E. C., and Nixon, J. F. (1976). “A theory of soil sedimentation.” Can. Geotech. J., 13, 294–310.
16.
Pane, V., and Schiffman, R. L. (1985). “A note on sedimentation and consolidation.” Geotechnique, 33, 67–72.
17.
Philip, J. R. (1957). “Evaporation and moisture and heat fields in the soil.” J. Meteor., 14(8), 354–366.
18.
Pruitt, W. O. (1966). “Empirical method for estimating evapotranspiration and its role in water resources management.” Proc., Evapotranspiration and Its Role in Water Resources Management, American Society of Agricultural Engineers, St. Joseph, Mich., 57–61.
19.
Richardson, J. F., and Zaki, W. N. (1954). “Sedimentation and fluidisation: Part I.” Trans. Inst. Chem. Engrs., 32, 35–53.
20.
Schiffman, R. L., Pane, V., and Gibson, R. E. (1984). “The theory of one‐dimensional consolidation of saturated clays, IV. An overview of nonlinear finite strain sedimentation and consolidation.” Proc., Sedimentation/Consolidation Models, 1–29.
21.
Schiffman, R. L., Vick, S. G., and Gibson, R. E. (1988). “Behaviour and properties of hydraulic fills.” Proc., Hydraulic Fill Structures.
22.
Shih, Y. T., Gidaspow, D., and Wasan, D. T. (1987). “Hydrodynamics of sedimentation of multi‐sized particles.” Powder Tech., 50(3), 201–215.
23.
Sparrow, G. J. (1981). “Calculation of maximum ponding depth to dewater a clay tailing.” Tech. Report MCC290, CSIRO, Div. of Mineral Chemistry, Melbourne, Australia, February, 1981.
24.
Swarbrick, G. E., and Fell, R. (1991). “Prediction of the improvement of tailings properties by desiccation.” Proc., Ninth Pan American Conf. on Soil Mechanics and Foundation Engineering.
25.
Thomas, D. G. (1964). “Turbulent disruption of floes in small particle size distributions.” J. Am. Inst. Chem. Engrg., 10(4), 517–523.
26.
Vick, S. G. (1983). Planning, design, and analysis of tailings dams. John Wiley & Sons, New York, N.Y.
27.
Yong, R. N. (1984). “Particle interaction and stability of suspended solids.” Proc., Sedimentation/Consolidation Models, 30–59.
Information & Authors
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Published In
Journal of Geotechnical Engineering
Volume 118 • Issue 4 • April 1992
Pages: 540 - 557
Copyright
Copyright © 1992 ASCE.
History
Published online: Apr 1, 1992
Published in print: Apr 1992
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