POWERED HAULAGE at Dominion Coal Corporation
The mantrip had stopped to re-hang a water line that was across the track. The op. got off the vehicle to help and hit the dump valve for the parking brake. The dump valve didn't fully relieve & in the process began rolling toward the employees. The injured jumped to the side and was caught between some stacked rock dust & the mantrip vehicle & was rolled beside the vehicle.
U.S. Mine Safety and Health Administration