Roof Fall outby working section in return aircourse; # 8 entry 1X inby spad No. 696 & No. 9 entry 1X to the right of spad No. 696. Fall was 4.5 to 5 feet high, 19 feet wide and 29 feet long. Using 4 & 5 foot tension rebar bolts. Approaches to fall supported and dangered off. Did not block passage of air or men. Will not be cleaned up.