While pushing a dewy-dag resin bolt up in the bolthole, the bolt slipped off of the bolt diver. The bolt fell back out of the hole striking the jackleg operator's helper in the mouth, breaking off one of his front teeth, and splitting his lip. He was taken to the dentist for an evaluation. No dental work was done at this time, but a crown will be needed in the future.
U.S. Mine Safety and Health Administration