Thursday, August 11, 2016

US mine safety agency issues safety alert for drill operators

... caught in a jackleg drill. Less than two years earlier, a 30-year-old contract driller at a shale quarry in Ulster County, New York, died in November 2012 , as he attempted to thread a new drill steel manually when the drill head rotated and ...
http://ift.tt/2aKSJhr

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