AN UNPLANNED ROOF FALL OCCURRED ON 12-4-00. THE FALL WAS LOCATED AT EP 23 ENTRY #3 SPAD 0734. DISTANCE FROM THE ACTIVE FACE WAS 6400' THERE WERE NO PERSONAL INJURIES, AND NO EQUIPMENT WA SINVO LVED. SIZE OF FALL MEASURED 18' BY 18' BY 8'. VENTILATION WAS NOT AFFECTED.