AN UNINTENTIONAL ROOF FALL OCCURRED 2-23-00 AT 8:30 PM ON D-5 PANEL NO. 2 ENTRY AT SURVEY STATION 4079. THE FALL WAS APPROXIMATELY 18 FT WIDE X 105 FT LONG X 8 FT HIGH. THE FALL CONTAINED 6 FT RESIN BOLTS. THE FALL WAS DANGERED OFF AND CRIBS BUILT AT APPROACHES.