AN ALLEDGED IGNITION OCCURRED ON THE 6 NORTH MAINS 088-MMU. THE JOY MINER WAS TRIMMING BOTTOM IN 0 ENTRY APPROXIMATELY 190 FT INBY 111 BLOCK TAG. EMPLOYEE STATED HE SAW AN ORANGE FLAME NEAR RIGHT GOB - DURATION LESS THAN (1) SECOND. SELF EXTINGUISHER - NO INJURIES - NO DAMAGE.