An unplanned roof fall occurred in the #8 Entry, 2 breaks inby spad #3155. The fall measured 20'LX18'WX4-5'High. This area was developed in August 2001 and suppored with 48"" resin bolts. Ventilation was not interrupted and passage was not hindered. Fall will not be rehabilitated. Jacks will be used to danger off area. Located approx 7000' from active section in return airway.