EMPLOYEE WAS SHOVELING BELT WHEN A PIECE OF SLATE FELL FROM THE RIB STRIKING HIM ON BACK OF HIS HEAD AND FOREHEAD. CAUSE WAS SAFETY AWARENESS. COMPLIANCE WITH RULES WAS A FACTOR, SAFETY EQUIPM ENT WAS NOT A FACTOR, MINING EQUIP/SYSTEMS NOT A FACTOR, MINER PROFIENCY A FACTOR.