NORTH MAINS #1 ENTRY. THE MINER WAS APPROX 15' IN THE #1 ENTRY. THERE WAS A ROCK BINDER 2 1/2' FROM THE TOP & THE MINER OPERATOR WAS CUTTING UNDER THE BINDER. SPARKS FROM A MINER BIT CAUSED A FRICTIONAL IGNITION THAT LASTED APPROX 1 SECOND.THE METHANE MONITOR WAS READING .6% METHANE AT THE TIME OF THE IGNITION. THE SECTION WAS SHUT DOWN UNTIL STATE & FED INVESTIGATION WAS COMPLETE.