A ROOF FALL OCCURRED ON UNIT #4, ENTRY #4 @ SURVEY STATION 9+80. THE FALL MEASURED 56' LONG X 18.5' WIDE X 10' THICK. THIS AREA HAD BEEN BOLTED WITH 6' FULLY GROUTED & 9' DOUBLE LOCK BOLTS. AL L APPROACHES TO THE AREA ARE BEING TIMBERED OFF OR LONG BOLTED.