Mine disasters have still occurred in recent years in the US , Examples include the Sago Mine disaster of 2006 , and the 2007 mine accident in Utah 's Crandall Canyon Mine , where nine miners were killed and six entombed . In the decade 2005-2014 , US coal mining fatalities averaged 28 per year . The most fatalities during the 2005-2014 decade were 48 in 2010 , the year of the Upper Big Branch Mine disaster in West Virginia , which killed 29 miners
Sago Mine disaster
Sago Mine disaster
Coal mining