EE STATED THAT HE WAS PRYING COVER OVER BY USING A SCREWDRIVER. THE TOOL SLIPPED HE LOST HIS BALANCE AND HIS FACE STRUCK THE EDGE OF THE CANOPY. CAUSE OF INJURY WAS AWARENESS AND NOT USING PRO PER TOOLS. COMPLIANCE WITH RULES/REGS NOT A FACTOR, PERSONNEL SAFETY ITEMS NOT A FACTOR, MINER PROFIENCY A FACTOR, MINING EQUIP/SYSTEMS NOT A FACTOR.