AN UNINTENTIONAL ROOF FALL OCCURRED IN THE 4-WAY INTERSECTION OF THE #4 ENTRY 1 AND 00 OF THE 6TH NORTH PANEL. THE FALL 60' LONG X 18' WIDE AND 6' THICK DID AFFECT THE SECONDARY ESCAPEWAY WHIC H WAS REROATED TO A DARRICK ENTRY. THE TOP WAS SUPPOTED WITH 4"" TO 6"" DOUBLE LOCK BOLTS. THE INTERSTATION WAS DEVELOPED IN NOV 2000.