An unplanned roof fall at #26 brk. on #2 belt, #1 entry 20' into the cc.. 2 to 1. Fall was approx. 5' thick X 35'l. X 19' w. Area was developed in 01/11. Occurred 2000' out-by the section feeder. No entrapment or injuries involved. No EQ., escape way, travel or ventilation involved.