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Posts Tagged ‘Brazil’

A little bit more on the failure of that tailings facility in Brazil from some-one on the ground:

The accident was in a very small mine close to Belo. It was an old tailings dam that was not  supposed to be in operation anymore. But they decide to pile dried tailings on top of it. I don’t have technical details about the failure but I guess it is very similar to a previous one I took you to see. At the moment of the failure, equipment was working at the same point. That’s the reason for the deaths. It is going to take some time for us to get the conclusions about the real cause of the accident. But, as soon as I get some more information I will let you know.

Thanks to this fellow for letting us know.

Here is another comment from someone in Brazil:

The Minas Gerais dam failure is worst because of dead people (3), which means that there is environmental process and also criminal. The problem I see from the two failures is that we still don´t know the causes. In Canada the cause seems to be overtopping or seepage thru the embankment (high pore pressures or piping); in Brazil it seems to have occurred static liquefaction, and the triggering cause possibly excavation of the outer slopes. But we haven´t seen any word about the causes. It is just my guess. In Canada the pictures we saw doesn´t show a good appearance of the dykes. It resembles coarse and loose material, not prepared to have any contact with water. In Brazil it was an old tailings dam, upstream construction, that was being used as a platform for the operation of settling ponds (we call it here “baias”), where the coarse settles and are removed by shovels and transported to piles, and the fines have the same destiny, but need more time to drain and do dry.

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Just got news of the failure of a tailings facility in Brazil.  I can find no English versions of the news.  There are many reports in Portuguese, and you can get them translated via Google.  They provide little information about the engineering causes or consequences, other than that at least three and possibly as many as ten are dead. (more…)

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Today my attention was directed to the new Guide For Mine Closure Planning.   The guide is prepared by IBRAM which is short for Instituto Brasilero de Mineracao, or in English the Brazilian Mining Association.  Well worth downloading and perusing if your interest lie in mine closure. The guide is focused around these seven guidelines: (more…)

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More is said about mine closure than is done about mine closure.  Will they ever close Giant and Faro?  I doubt it.  Still if the topic interests you, here a few upcoming events. The InfoMine Mine Closure Conference in Belo Horizonte promises lots of information about mine closure in Brazil.  Not many of us can get that far south or want to go that far south. Last time there was an InfoMine conference in Belo, there were riots and protests and the delegates were confined to the hotel. (more…)

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Mining.com reports that Canada has been spying on Brazilian mining:

Brazilian television OGlobo aired Sunday night a program showing that U.S. National Security Agency contractor, Edward Snowden, leaked documents that reveal Canadian spy agencies tracked the country’s Mines and Energy Ministry e-mails and phone calls. (more…)

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Brazil Mining Photos

Just back from a trip to Brazil.  Here are some photos. The boats took us upriver to the site of a proposed mine.  Artisanal mining is in progress at the site and it is a dirty and dangerous.   

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InfoMine’s section on mining technology & engineering recently added a new feature: Continuous Conferences.  (I disclose that I sometimes work with them and want them to succeed.)  Here are two pieces that I posted today.  I post them here to make it easier for you to access them. (more…)

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