A NON-INJURY UNPLANNED ROOF FALL OCCURRED OUTBY THE ACTIVE SECTION IN #8 ENTRY, RIGHT RETURN. THE FALL IS APPROXIMATELY, 50 FEET LONG, 20 FEET WIDE AND 4 TO 7 FEET THICK. FULLY GROUTED RESIN BOLTS HAD BEEN USED. STRATA IS LAMINATED SHALE WHICH GAVE WAY.