EE WAS HELPING WITH WORK ON REPLACING PRIMARY CRUSHER FEEDER LINER... BEGAN DESCENDING STEEL LADDER TO RETURN TO SHOP FOR MORE TOOLS..LADDER WAS BENT AND FOOT OF THE LADDER KICKED OUT... LADDER FOOT WENT THROUGH 20""GAP SEPARATING THE LEVELS THE FEEDER AND CRUSHER WALKWAYS ARE ON...EE FELL TO THE CRUSHER WALK ABOUT 10', THIS RESULTED IN FRACTURES TO WRIST AND TOES ON LFT.FOOT.