Unintentional roof fall occurred on the North Mains Section, MMU 001-0, in Xct to the right of Station 731, #5 Entry, 86 Block. Fall measured approx. 8'H X 30'L X 18' W. Area mined on 12/12/06. Overburden approx. 220'. Area previously supported with 5' fully grouted resin bolts. No injuries or property damage. Called fall in at 10:30 AM to MSHA and WVMHS&T