AN UNPLANNED ROOF FALL OCCURRED IN THE #11 - #13ROOM (#2-#4) OFF 4 NORTH. FALL WAS FOUND BY MINE FOREMAN WHILE MAKING HIS REQUIRED WEEKLY AIR COURSE EXAMINATION. FALL WAS LOCATED 2 X-CUTS INBY SURVEY STATION #3535, APPROX 15' HIGH, 19' WIDED 110' LONG. DID NOT AFFECT ANY EQUIPMENT OR VENTILATION. AREA TIMBERED AND DANGERED OFF.