EMPLOYEE WAS CHANGING A SPRAY ON THE HEAD OF THE MINER. A CABLE BOLT WAS WRAPPED AROUND THE DRUM. WHEN HE LEANED OVER THE DRUM HE BUMPED THE CABLE BOLT & IT SPRUNG FREE STRIKING HIM IN THE NOS E. CAUSE OF THIS INCIDENT WAS SAFETY AWARENESS. COMPLIANCE WITH RULES/REGS WAS NOT A FACTOR; PERSONAL SAFETY EQUIP. NOT A FACTOR; MINER PROFICIECY A FACTOR; MINING EQUIP/SYSTEMS NOT A FACTOR.