A roof fall occurred in the #4 entry of the Southeast mains section, MMU 001-0. The fall occurred approximately 80 feet inby S/S 509. The fall was approximately 40 feet in length, and 20 feet of the area that fell was unbolted. The roof supports in the area that fell out were 4' fully grouted resin bolts. The height of the fall is unknown, but is above the anchorage zone.