SUPERVISOR WAS HOLDING A PAIR OF CHANNEL LOCKS PLIERS HOLDING A BOLT. THE PLIERS SLIPPED & HE CUT HIS HAND ON A SHARP PIECE OF THE FACE FLIGHTCAUSE OF INJURY WAS NOT WEARING PROTECTIVE GLOVE S COMPLIANCE WITH RULES.REGS A FACTOR, PROTECTIVE EQUIP A FACTOR MINER ATTITUDE A FACTOR MINING EQUIP/SYSTEMS COULD BE A FACTOR