ALLEGED INCIDENT WAS TO HAVE OCCURRED WHILE THIS EE WAS ATTEMPTING TOLIFT A ROCK FROM UNDER THE BELT. CAUSE OF INJURY WAS IMPROPER LIFTING & BODY POSITIONING. RULE/REGS NOT A FACTOR, PROTECTIV E EQUIPMENT A FACTOR (BACK SUPPORT BELT), MINER PROFICIENCY A FACTOR, MINING EQUIPME/SYSTEMS NOT A FACTOR.