A SELF EXTINGUISHING FRICTIONAL IGNITION OCCURRED ON THE RIGHT 002 SECTION IN THE #3 LEFT WORKING PLACE. NO ONE WAS INJURED AND NO EQUIPMENT DAMAGE OCCURRED. THE IGNITION OCCURRED WHEN THE VEN TILATION WAS RESTRICTED DUE TO THE POSITIONING OF THE CONT MINER AND THE GOB THAT WAS UNDER AND TO THE SIDE OF THE LINE CURTAIN, WITH THE MINING HEIGHT AND WIDTH OF THE PLACE.