Some comments on the prediction of mine waste beach slopes

Morris, P. H. and Williams, D. J. (1999) Some comments on the prediction of mine waste beach slopes. International Journal of Surface Mining, Reclamation and Environment, 13 1: 31-36. doi:10.1080/09208119908944199


Author Morris, P. H.
Williams, D. J.
Title Some comments on the prediction of mine waste beach slopes
Journal name International Journal of Surface Mining, Reclamation and Environment
ISSN 0920-8119
Publication date 1999-01-01
Year available 2007
Sub-type Article (original research)
DOI 10.1080/09208119908944199
Open Access Status
Volume 13
Issue 1
Start page 31
End page 36
Total pages 6
Place of publication Rotterdam, Netherlands
Publisher A. A. Balkema
Subject 290700 Resources Engineering
290701 Mining Engineering
C1
771099 Other
290899 Civil Engineering not elsewhere classified
Abstract The profiles of beaches formed by the hydraulic deposition of mine wastes from a pipeline are important in the design of mine waste impoundments. However, there is at present no satisfactory method of predicting the slopes of such beaches. In this paper, the compatibility with the available quantitative hydraulic data of the assumptions incorporated in existing models of deposition on mine waste beaches is explored. The available quantitative data show that flows on mine waste beaches may be laminar or turbulent and subcritical, but none support the occurrence of supercritical flows. Nevertheless the possibility that such flows occur cannot be discounted. The available data also show that deposition occurs in the main flow channels of both mine tailings and coal co-disposal beaches. Empirical correlations between the slopes of both mine tailings and co-disposal beaches and the dimensionless particle size of the wastes are presented. These may be used to obtain first estimates of such slopes, but have not been validated with independent data. Neither the range of particle sizes present in a given tailings nor the discharge appear to have a significant effect on the slopes of tailings beaches, but the slopes of thickened tailings beaches are strongly dependent on the solids concentration. Within normal operating limits, the slopes of coal co-disposal beaches appear to be largely independent of the solids concentration and particle shape
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Civil Engineering Publications
 
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Created: Wed, 12 Dec 2007, 00:46:55 EST by Bikash Das on behalf of School of Engineering