A ROOF FALL WAS DISCOVERED DURING A PRE-SHIFT EXAMINATION OF THE 002-0 SECTION IN PREPARATION FOR THE 3RD SHIFT. THE FALL MEASURED APPROXIMATELY 80'-90'LONG X 18'-20'WIDE X 2'-4 1/2'THICK AND FELL IN THE LAST OPEN CROSSCUT OF THE NO. 4 HEADING THROUGH THE X-CUT AND THROUGH THE NO 3 INTERSECTION. THE FALL OCCURRED 1 CROSSCUT INBY SURVEY STATION NO 908 IN THE NO.4 ENTRY. THE ROOF CON