An unplanned roof fall occurred at spad #4317 on the 001 section between the #3 and # 4 entries. The fall occurred approx. 2400' from active face. This area was developed approx. 10/15/09. Fall measured 30'L X 20'W x 5' H. Ventilation and passage of person was not affected. Area will be rehab'd. State and Federal Agencies were notified immediately.