AN UNINTENTIONAL ROOF FALL OCCURRED IN THE #4 ENTRY (BELT & TRACK) #6 BELT AT BREAK #239, 2 BREAKS INBY SPAD #1334. SIZE OF FALL WAS APPROXIMATELY (70'L X 18-20'W X 6-7'H). AREA HAD BEEN SUPPO RTED WITH 4' FULLY. NO INJURIES, VENTILATION WAS NOT INTERRUPTED, BELT & TRACKWAY WAS BLOCKED.