ALLEGED INCIDENT WAS TO OCCURRED WHILE THIS EE WAS PULLING HYD HOSES. HOSES CAUGHT AND HE CLAIMS HE STRAINED HIS BACK. CAUSE OF INJURY WAS OVEREXERTION. COMPLIANCE WITH RULES/ REGS NOT A FACTO R, PROTECTIVE EQUIP NOT A FACTOR, MINER PROFICIENCY COULD BE A FACTOR, MINING EQUIPMENT/SYSTEM NOT A FACTOR.