AN UNINTENTIONAL ROOF FALL OCCURRED 2 BREAKS OUTBY SPAD 12502 ON THE HEADGATE 14 SECTION. THE FALL MEASURED APPROXIMATELY 80' LONG, 19' WIDE & 4'-6' HIGH. THERE WAS NO EFFECT ON VENTILATION BU T DID AFFECT WEEKLY EXAMS. NO ONE WAS INJURED AND FALL WILL BE TIMBERED FOR A TRAVELWAY.