AN UNINTENTIONAL ROOF FALL WAS DISCOVERED IN THE 2ND NORTH SUB-MAINS, X-CUT 21 BETWEEN THE #4 & #6 ENTRIES. THE FALL MEASURED APPROXIMATELY 60'L x 15'W x 5'H, DOME SHAPED. THE FALL OCCURED IN AN AREA THAT WAS BOLTED WITH 5' RESIN GROUTED BOLTS, PRIOR TO THE OPERATORS VOLUNTARY CHANGE TO 6' RESIN GROUTED BOLTS.