Abstract
Mining generates 13 billion tonnes per year of potentially toxic wet slurry waste, called tailings, commonly deposited in tailings storage facilities (TSF). Since 1915, 257 TSF failures have occurred, releasing a total of ~250 million m3 of tailings, destroying areas up to ~5,000 km2, killing an estimated 2,650 people and impacting ~317,000 people through displacement, property damage, and risks to livelihoods and health. In this Review, we provide an interdisciplinary approach to understanding the causes, effects and response to TSF failures, applying a disaster risk reduction framework. TSF failures can occur owing to earthquakes, overtopping, weak foundations and liquefaction, among other mechanisms. The severities and volumes of TSF failures have increased since the year 2000, owing to increasing mine waste generation from the exploitation of larger, lower-grade deposits. Despite the increasingly severe impacts, the mining industry has been hesitant to use the term ‘disaster’ to analyse TSF failure, presumably to avoid liability. TSF failures should be considered as disasters when they cause severe disruption to the functioning of ecological and social systems. Future research should build on attempts to link tailings facility locations to situated risk factors by improving spatial and time series analysis, reducing reliance on corporate disclosures, and increasing the visibility of priority locations and patterns of concern.
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Acknowledgements
The contribution of D.K. was in part supported by the Australian Research Council grant LP200301160. The authors are grateful to A. Amanda Andrade for her feedback on an early draft of the manuscript. K.A.H.-E., D.K., D.M.F. and E.M. acknowledge the QUEX Institute (https://www.exeter.ac.uk/global/quex/) for helping to facilitate our collaboration.
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Glossary
- Ash
-
The powdery inorganic waste material remaining after the combustion of mineral materials.
- Best available practice
-
(BAP). Best available practices for tailings storage facilities, which include monitoring of physical mechanisms and human factors that could result in tailings storage facility failures.
- Global Industry Standard on Tailings Management
-
(GISTM). The global standard developed by the United Nations Environment Programme (UNEP), International Council on Mining and Metals (ICMM) and Principles for Responsible Investment (PRI) in 2020 that requires operators to be responsible for, and prioritize the safety of, TSF throughout its life cycle.
- Slags
-
The glassy siliceous waste materials remaining after the smelting of metal ores.
- Tailings
-
Finely crushed rock and processing fluids left over after the economic materials of the mined resource have been extracted; they can contain potentially toxic, corrosive and radioactive components.
- Tailings dams
-
TSF barriers constructed to hold back the tailings; it is the part of the TSF that has the highest tendency to fail.
- Tailings storage facility
-
(TSF). Engineered facility designed to contain tailings; it can be an open pit, a dammed impoundment or an underground void.
- TSF disasters
-
TSF failures that cause severe impacts and result in serious disruption to social, environmental and economic systems.
- TSF failures
-
Failures of the dam or other part of the storage facility designed to hold back the tailings in the TSF.
- Waste rock
-
Mined rock that does not contain ore minerals at sufficient grades to be economic and does not undergo mineral processing.
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Hudson-Edwards, K.A., Kemp, D., Torres-Cruz, L.A. et al. Tailings storage facilities, failures and disaster risk. Nat Rev Earth Environ 5, 612–630 (2024). https://doi.org/10.1038/s43017-024-00576-4
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DOI: https://doi.org/10.1038/s43017-024-00576-4