AN UNENTINTIONAL ROOF FALL OCCURED JUST OUTBY THE UNIT 1 WORKING SECTION IN THE INTAKE AIRCOURSE. THE FALL OCCURED AT THE +5005 FOOT MARK OF THE NO.5 ENTRY. IT MEASURED 20'X30'X5. THE FALL OCCURED DUE TO THE FACT THE ROOF STRATA BROKE AT & BELOW THE POINT OF ANCHOR. THE FALL AREA WILL NOT BE CLEANED UP.