AN UNINTENTIONAL FOOR FALL OCCURRED IN THE #4 ENTRY (BELT) INBY SPAD #9398 3 SOUTH MAINS. SIZE ESTIMATED TO BE 160' L X 18-20' H. THE AREA HAD BEEN SUPPORTED WITH 5' TORQUE TENSION BOLTS WITH SUPPLEMENTAL SUPPORT CONSISTING 10' AND 16' ROPE BOLTS. NO INJURIES, BELT LINE CAUGHT, VENTILATION WAS NOT INTERRUPTED. FALL WILL BE CLEANED UP.