Roof fall was discovered in the inactive working of the old 3 main panel at spad location 1934 extending over toward 1940 between No. 1 and 2 entry. Fall was approximately 40' in length, 20' in width and 6' 1/2 in height. Area was developed 11/15/2011. Cribs set and timbers. Area dangered off. Ventilation controls were not affected. No injuries, no equipment involved.