A FRICTIONAL IGNITION OCCURRED AT THE FACE OF THE #4 ENTRY WHICH HAD BEEN MINED IN 132 FEET IN THE F-12 SECTION. THE FLAMES FROM THE IGNITION LASTED APPROX ONE MINUTE AND WERE EXTINGUISHED WITH THE WASHDOWN HOSE, 1 1/4 INCH WATERLINE AND A FIRE EXTINGUISHER. THERE WERE NO INJURIES OR DAMAGE TO EUQIPMENT.