THE INJURED PLACED HIS LEFT HAND ON THE BOLT MACHINE TO MAINTAIN HIS BALANCE AS HE BENT OVER TO PICK UP AN INSERT HE HAD DROPPED, WHEN A PIECE OF ROOF ROCK FELL OUT OF THE MINE ROOF STRIKING H IM ON THE INDEX FINGER OF HIS LEFT HAND. RESULTED IN A CUT AND A BROKEN BONE ON THIS FINGER. HE COMPLETED WORKING THE SHIFT AND RETURNED TO WORK ON HIS NEXT SCHEDULED WORK DAY.