An unplanned roof fall occurred in the #2 entry of the old Headgate #2 section, this fall occurred at spad #4451, in the #2 Entry. Ventilation and passage of persons was not affected. Fall measures 80'L X 20'W X 6-8'H. Area was supported by 48"" resin Bolts. All entries have be breakered off. State/Fed agencies notified.