EE WAS BOLTING #1 FACE. ROOF ABOVE BROKE LOOSE, FELL DOWN STRIKING CANOPY. A PIECE BOUNCE OFF DRILL HEAD STRIKING VICTIM ON TOP OF FOOT. CAUSE WAS NOT OBSERVING AND SECURING LOOSE TOP. COMPLIA NCE WITH RULES/REGS WAS A FACTOR. PROTECTIVE EQUIPMENT NOT A FACTOR. MINER PROFICIENCY A FACTOR,MINING SYSTEMS NOT A FACTOR.