A ROOF FALL OCCURRED IN THE LAST OPEN CROSS CUT OF INTERSCTION INBY SPAD #1159 AT THE #5 HEADING MEASURING 25'X28'X8'. A ROOF BOLTING MACHINE FLETCHER 000-15-FC-B WAS INVOLVED IN THE FALL. THE VENTILATION WAS NOT DISTURBED. NO INJURY OCCURRED. THE FALL WILL NOT BE CLEANED UP.