ROOF FALL #4 ENTRY (BELT ENTRY) B-18 TO OUTBY B-20 #1 R+SUBMAIN OFF OF G-LEFT SUBMAIN ONE BREAK OUTBY FACE, FALL OCCURRED AFTER SECTION WAS BEING ABANDONED DUE TO ADVERSE ROOF CONDITIONS, FALL STARTED BY CLAY VEIN, ROOF WAS SHOWING BROKEN CONDITIONS DUE TO ROLLING COAL SEAM AND OVERHEAD STREAM VALLEY PARALLEL TO FALL DIRECTION.