A Roof Fall (70' long X 8' high X 16' wide) was found in the 6-North Intake at 14 block, # 7 entry outby spad location 7427. There were no persons injured, ventilation not disrupted but the walk way is obstructed. No equipment was involved and no other 50.20 criteria applies. Approaches to the fall supported and the intake will be made common with the return air course..