AN UNPLANNED ROOF FALL OCCURRED IN THE #14 ROOM THROUGH #18 ROOM OFF 4 NORTH. FALL WAS FOUND AT EXAMINER WHILE MAKING WEEKLY RUN. FALL CHANGED AIR COURSE RUN AND A MEETING WITH MSHA PERSONNEL WAS HELD TO ESTABLISH MP LOCATION. FALL DID NOT EFFECT ANY EQUIPMENT OR VENTILATION. FALL WAS APPROX. 6' HIGH, 19' WIDE, 200' LONG. AREA TIMBERED AND DANGERED OFF.