Google translate. Seems to be about tailings dams. Cheap ones...

Google translate. Seems to be about tailings dams. Cheap ones and how they bust.
..... Here's some:

Mine damages, my article in swedish languageIn a short time, several damages have occurred in different parts of the world and caused major disasters. Most accidents have been caused by dams, by so-called "Upstream construction". Upstream built mining dams mean that the rise of the pond is partly made on the enrichment sand closest to the pond and partly on the previous year's pond crown. The name derives from the fact that the dust crown moves in the upstream direction in relation to the crest of the starting pond. The advantage for the operator with upstream built-up pond is that it is a cheap and simple pond construction. The upstream construction is characterized by fast construction time and thus quick start-up of mining operations. The probability of dam breaks also varies with the age of the mine. The main drawbacks of the design are a general low relative density with high water saturation, which places high control requirements on the port pressure line. Upstream built mining dams also have low resistance to seismic activities and they are…