A unplanned roof fall occurred at Spad#1448 in the #6 Entry on the Old#2 Left Panel. The size of the fall was 80'L. X 18'W. X 3-5' H. Passage of person was not affected, ventilation was affected. Area was developed on Jan. 2011 and was originally supported resin roof bolts. Area has been dangered off, and will not be rehabilitated. Federal and State Agencies notified immediately.