WHILE MINER WAS HOOKING UP LIFTING STRAPS TO LIFT AND REMOVE DISCHARGE SHUTS ON PLANT FOR REPAIR, MINER SLIPPED ON A LOOSE PART OF WORK PLATFORM RESULTING IN A FALL OF A DISTANCE OF 5 FT ONTO A CONCRETE FLOOR. AS A RESULT OF FALL THE LEFT ELBOW, LEFT SHOULDER AND LEFT RIB CAGE OF MINER WERE INJURED.