EMPLOYEE WAS HELPING ROOF BOLTERS (MAKING UP ROOF BOLTS) IN THE FACE OF NO.5 ENTRY WHEN A PIECE OF ROCK FELL MEASURING 41""X51""X0""-4"" FELL FROM THE TOP STRIKING THE EMPLOYEES HEAD AND BACK. THE ROCK FELL FROM BETWEEN 4 PERMANENT ROOF SUPPORTS FULLY RESIN 4'BOLTS. EE SUFFERED INJURIES - LACERATIONS & AVULSIONS TO THE FOREHEAD & LEFT EAR AS WELL AS INJURIES TO NECK & BACK.