Injured was the rib bolter on the right side of the full face Alpine miner in the face of the future belt entry in St Leo when some head coal fell out from between the roof straps (approx. 4' long, 5' wide and 2-3"" thick) and struck the injured's hard hat, driving it down and causing minor lacerations (no sutures) to nose and lip, as well as a minor contusion behind right ear.