EE WAS DESCENDING THE BUCKET OF A BOBCAT LOADER ADN HE SLIPPED ON THE EDGE OF THE BUCKET. HE ATTEMPTED TO CATCH HIMSELF ADN TWISTED HIS BACK. CAUSE OF THIS INJURY WAS AWARENESS AND WEATHER C ONDITIONS. COMPLIANCE WITH RULES/REGS NOT A FACTOR, MINING EQUIPMENT NOT A FACTOR, PROTECTIVE EQUIP WAS NOT A FACTOR, MINER PROFICIENCY A FACTOR