ALLEGED INCIDENT WAS TO HAVE OCCURRED WHILE THIS EE WAS UNLOADING ROCK DUST FROM A SHIELD CAR. CAUSE OF THIS INJURY WAS IMPROPER LIFTING AND BODY POSITIONING. COMPLIANCE WITH RULES/REGS NOT A FACTOR, PERSONNEL EQUIPMENT NOT A FACTOR, MINER PROFICIENCY A FACTOR, MINING EQUIPMENT NOT A FACTOR, BUT MINING SYSTEMS COULD BE A FACTOR.