A simplified approach to assess seismic stability of tailings dams |
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| Authors: | Sanjay Nimbalkar VS Ramakrishna Annapareddy Anindya Pain |
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| Affiliation: | 1. School of Civil and Environmental Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Sydney, NSW 2007, Australia;2. Geotechnical Engineering Group, CSIR-Central Building Research Institute (CBRI), Roorkee, 247667, India |
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| Abstract: | In the zones of high seismic activity, tailings dam should be assessed for the stability against earthquake forces. In the present paper, a simplified method is proposed to compute the factor of safety of tailings dams. The strain-dependent dynamic properties are used to assess the stability of tailings dams under seismic conditions. The effect of foundation soil properties on the seismic stability of tailings dams is studied using the proposed method. For the given input parameters, the factor of safety for low-frequency input motions is nearly 26% lower than that for high-frequency input excitations. The impedance ratio and the depth of foundation have significant effect on the seismic factor of safety of tailings dams. The results from the proposed method are well compared with the existing pseudo-static method of analysis. Tailings dams are vulnerable to damage for low-frequency input motions. |
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| Keywords: | Tailings dam Horizontal slice method (HSM) Limit equilibrium Strain-dependent property Pseudo-static method |
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