A FALL OF ROOF OCCURRED IN THE WEST MAIN ENTRIES IN THE #2 ENTRY AT XCUT #6 APPROX. 10,900' OUTBY THE SECTION. THE FALL WAS APPROX 26' LONG X 20' WIDE X 6 1/2' HIGH. THE AREA WAS SUPPORTED WIT H 6' FULLY GROUTED BOLTS AND TIMBERS. THE APPARENT CAUSE WAS AN UNDETECTED BREAK IN THE ROOF STRATA.