An employee was traveling the track way on 23 right section when the roof fell inby him. He did observe the roof fall. The roof fell on 23 right no. 3 entry at survey station n. 29683. All approaches to the fall have been timbered off. The fall did not interrupt the ventilation. The fall will be cleaned up later. The fall was approximately 22' wide, 70' long and app 10' thick