Tailings beach slope prediction: a new rheological method

Abstract

A new semi-empirical model for tailings beach slope prediction is presented. The model is based on existing non-Newtonian rheology theory combined with some well-established turbulent channel flow equations. It is shown that solid particles do not deposit from the self-formed channels of the tailings slurry as it flows down the beach, and that the slope of the beach is dictated by the channel slope, which is set by the flow parameters and the rheological parameters of the slurry. Two experimental programmes have taken place at tailings storage facilities in Australia, with the experimental results providing validation for the model.

Keywords:

• Tailings
• Beach slope
• Rheology
• Open channel
• Non-Newtonian
• Turbulent flow

Acknowledgements

This industry-sponsored project is funded by the Australian Research Council (ARC) and industry sponsors Australian Tailings Consultants (ATC) and AngloGold Ashanti. Further support has also been given by Wheaton River Minerals, the operator of Peak Gold Mine in Cobar, NSW. In addition to those listed above, acknowledgement is also given to Peter Lam (ATC), Behnam Pirouz (NICICO) and Alex Walker (ATC) for their input and assistance during the field experimental programmes. Recognition also goes to those who provided support at Australian Tailings Consultants, Sunrise Dam Gold Mine and Peak Gold Mine.