AN UNINTENTIONAL ROOF FALL WAS DISCOVERED IN #9 ENTRY OF 2 WEST MAINS SECTION (MMU 074) SURVEY 38 AND 56. THE AREA WAS A BAD ROOF AREA (MUD VEIN) FALL WAS APPROX 20' WIDE 20' LONG AND 10' HIG HER THAN MINE ROOF IN THE AREA. APPROACH TO FALLIS SUPPORTED AND DANGERED OFF.