A ROOF FALL OCCURRED ON THE 005 PILLAR SECTION IN THE #2 ENTRY STARTING AT THE PILLAR LINE AND EXTENDING OUTBY APPROXIMATELY 70 FEET. THE FALL WAS OUTBY CROSSCUT #57 AND WAS APPROXIMATELY 20' X 70' X 9' THICK. FIVE FOOT HIGH TECH ROOF BOLTS HAD BEEN INSTALLED IN THE AREA AND 6' AND 9' SUPPLEMENTARY SUPER BOLTS HAD BEEN INSTALLED ALSO.