A PILLAR FALL OCCURRING IN THE #8 ENTRY LIFT 4B CAUSED A DISRUPTION OF REGULAR MINING FOR MORE THAN 1 HOUR. THE FALL WHICH OCCURRED IN BY PERMANENT SUPPORTS WAS ABOVE THE ANCHORAGE ZONE FOR RO OF BOLTS WHICH WERE OUT BY. NO PERSONAL INJURIESOCCURRED AS A RESULT OF THE PILLAR FALL. FALL MEASURED 20' LENGTH 5' WIDTH 5' HIGH. MSHA DIST 6 WAS NOTIFIED AND CONDUCTED AN INVESTIGATION.