EMPLOYEE WAS INSTALLING ROOF BOLTS IN THE 3RD RIGHT CROSSCUT. HE ADVANCED THE BOLTER TO INSTALL ANOTHER ROW OF BOLTS. WHILE STANDING AT HIS DRILL STATION WITH HIS RIGHT HAND ON THE DRILL STEEL TRAY A PIECE OF ROCK, 32"" X 24"" X 3"" FELL FROM THE MINE ROOF STRIKING HIS RIGHT PINKEY FINGER RESULTING IN A FRACTURE AND SIX SUTURES