AN UNINTENTIONAL ROOF FALL OCCURRED IN THE #5 ENTRY OF OLD 3 MAINS AT SURVEY SPAD #U446. THE FALL MEASURED APPROX 40'LONG, 20'WIDE, AND 6.5'HIGH. FALL AREA HAD BEEN SUPPORTED WITH 5' RESIN ROD S. NO EQUIPMENT, VENTILATION OR TRAVEL WAS AFFECTED. AREA APPROACHED WERE TIMBERED AND WILL NOT BE CLEANED UP.