An unplanned roof fall occurred 40ft. inby spad 1393 in the #3 entry, along the 001 Section North East Mains. Measured approximately 20ft. wide by 16ft. long by 6ft. high in an area that had already been ""dangered off"", pulling 2 rows of fully grouted roof support. Found by examiner around 10:10pm and reported to MSHA's hotline immediately thereafter.