An unplanned roof fall occurred at spad #4413 in the #1 entry return. The fall is located approx 2000 ft from active section in the return airway. Area was developed Feb 2010. Fall measures 20'L x 20'W x 6'H. Ventilation & passage of person was not affected. Area was supported by 48"" resin bolts initially. All entries have been breakered off. This fall will not be rehabilitated.