INSIDE COAL MILL #2 LINE REMOVING LOWER SKIRT. AFTER LOOSENING SKIRT EMPLOYEE ROTATED SKIRT AROUND TO THE DOOR. EMPLOYEE TRIED TO LIFT SKIRT WHILE LYING ON SIDE. LOST TIME - RTW DATE UNKNOWN. POSSIBLE RECUR OF OLD BACK INJ OF 1/4/01. CHIRO CARE BEGAN 8/29/01.