An unplanned roof fall occured in the #6 entry of the 001-0 section. This fall occurred at spad #4154, 3045 feet from the active face. Roof fall was in the intake. Ventilation and passage was obstructed. Fall measures 20 feet long x 30 feet wide x 8 feet high. Area was developed 5/2009. Roof support consisted of 48"" resin roof bolts. State & Federal agencies notified immediately.