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Environmental Earth Sciences

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01-07-2011 | Original Article

Effects of monsoonal rainfall on waste dump stability and respective geo-environmental issues: a case study

Authors: Mohan Yellishetty, William J. Darlington

Published in: Environmental Earth Sciences | Issue 6/2011

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Abstract

The stability of mine waste dumps is of critical importance and an issue, the mining industry of Goa, India is continually facing. The State of Goa receives high rainfall of around 3,000 mm annually. This heavy monsoonal rainfall is often believed to be the cause of dump slope instability. In light of several dump collapses encountered in the State and their damaging effects on both mine operations and local geo-environmental conditions, this paper examines their stability considering various geotechnical factors and the downstream environmental effects of a slope failure. The mechanical properties of dump waste material are reported at different compaction levels. The effect of these properties and changes in pore-water pressure are specifically examined using limit equilibrium analysis. An empirical formula is developed relating dump height, material mechanical parameters and pore-water pressure to the factor of safety of the slope. It was found that the level of compaction experienced by the material had a significant effect on the factor of safety.

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Title: Effects of monsoonal rainfall on waste dump stability and respective geo-environmental issues: a case study
Authors: Mohan Yellishetty
William J. Darlington
Publication date: 01-07-2011
Publisher: Springer-Verlag
Published in: Environmental Earth Sciences / Issue 6/2011
Print ISSN: 1866-6280
Electronic ISSN: 1866-6299
DOI: https://doi.org/10.1007/s12665-010-0791-0

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