An unplanned roof fall occurred at the glory hole mains in the #4 entry at spad #3191. No injuries reported. No equipment involved. Ventilation and passage of person not affected. Fall measured 100' x 19' x 2' to 10'. All entrances to fall have being breakned off. Areaa will be rehabilitated. Fall was 12 ft fromt he active face. MSHA and slate were notified immediatetely.