AN UNINTENTIONAL ROOF FALL OCCURRED IN AN INTERSECTION OF THE NO. 4 ENTRY AT SURVEY STATION 767 BELT ENTRY ON THE SOUTH MAINS MEASURING APPROX. 30' LONG X 25' WIDE AND 6-8' HIGH. AREA WAS PREV IOUSLY SUPPORTED BY 4',6', X 5/8"" FULL GROUTED BOLTS THE AREA OF ROOF TO BE REHABILITATED.