A Victorian court convicted a grain operator after a grain auger accident in 2010. See the reports below in the Wimmera Mail-Times and from Worksafe Victoria. http://www.mailtimes.com.au/news/local/news/general/laharum-bulk-handling-cops-50000-fine/2599790.aspx
According to the reports the injured was working in a grain silo with a sweep auger. Since the accident it is reported to be better guarded. Just how would be interesting as this is a problem in the USA.
However, some completely different thinking might be better. This video shows a different concept using paddles instead of an auger. Although the guarding is a good idea and also the control changes, a fundamental change to the auger operation might be a better safe design method.
By the way – the auger in the picture is not for grain – but it is the same principle.