AN UNINTENTIONAL ROOF FALL OCCURRED IN 3 SOUTH -2 EAST PANEL, #1 ENTRY AT #42 CROSSCUT. THE ROOF FALL WAS 80'L X 18'W X 6'H. LOCATED IN THE RETURN AIR COURSE AT #42 CROSSCUT IN A THREE WAY INT ERSECTION. THE FALL WAS TIMBERED OFF AND WILL NOT BE CLEANED UP.