Six miners trapped in coal mine after Utah quake »
Posted by: TechnologyExpert 1 year agoA coal mine collapsed Monday in central Utah, trapping six miners, less than 20 miles from the epicenter of a 4.0 magnitude earthquake, authorities said. The Genwal mine reported a "cave-in" at 3:50 a.m., an hour after the earthquake, the Emery County sheriff's office said.
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blainegarrett1 year ago
There have been claims that the Mine was using "retreat mining" which they claim they were not.
I didn't know what retreat mining was, so I looked it up.
From : http://www.umwa.org/mining/ugmine.shtml
"When mining advances to the end of a panel or the property line, retreat mining begins. In retreat mining, the workers mine as much coal as possible from the remaining pillars until the roof falls in. When retreat mining is completed, the mined area is abandoned."
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