AN UNINTENTIONAL ROOF FALL OCCURRED BETWEEN THE #38 AND #39 XCUTS OF THE 2ND MAIN EAST TRAVELWAY. THE AREA WAS SUPPORTED WITH 4' AND 5' CONVENTIONAL TYPE ROOF BOLTS. THE FALL OCCURRED DUE TO F AILURE IN THE STRATA BELOW THE POINT OF ANCHOR. THE FALL WAS 30' LONG X 16' WIDE X 2' THICK. AREA WILL BE CLEANED UP.