There was a non-injury accident at the #10 coal feeder in the clean coal draw tunnel. The belt went off & smoke was observed at app 9:51 AM. Plant foreman could not determine the source of the smoke so he notified Superintendant & the Safety Dept. Contacted the State at 10:16 AM & the MSHA Hot Line at 10:28 AM. The fire was extinguished at 11:30 AM & verified out at 12:02 PM.