An unintentional roof fall was discovered in the Primary Escapeway on 7 North Belt Intake, Entry # 6 between breaks 4-5. The crew has withdrawn outby the affected area and is currently dangering off the fall and re-routing the lifeline. MSHA and State Officials have been notified. No injuries or entrapments occurred from this incident. The fall is approx. 10' high and 50' long.