An unplanned roof fall occurred in the #8 entry. 2 breaks Inby spad #6414,1700' from active sect. Roof fall did not affect ventilation, passage of persons was affected. Area was developed 6/2011 and roof support consisted of 5' Torque Tension roof bolts Fall Measured 20'LX20'WX6'High. fall will not be rehabilitated. Federal and State Agency's were notified immediately.