A ROOF FALL OCCURRED IN THE NUMBER 3 ENTRY (BELT HAULAGE) OF THE 2 NORTH AREA OF MINE; THE HIGH ANGLE SLIP MEASURED APPROX. 25' L X 10' H X 18' WIDE. THE FALL WAS APPROX. 80' INBY SURVEY STAT ION 399 & CAUGHT THE UNIT 1 #1 CONVEYOR BELT. THERE WERE NO INJURIES AND VENTILATION WAS NOT AFFECTED.