At 7:50am an unplanned roof fall was encounterd in the secondary escapeway for the number one section. It began approxiamately 50' inby survey station 5261 and extended 5' into the intersection of survey station 5278. The fall was 25-30' long, 16' wide and appeared to be 5-6' in height. All aproaches were dangered and breakered off. MSHA was notified at 8:00am.