A 6:10 PM THE GUARD NOTICED SMOKE COMING FROM THE MINE FAN. A FIRE WAS FOUND ON THE SLOPE BELT AT THE OUTSIDE AIR LOCK DOORS. FAN WAS SHUT DOWN AND POWER KNOCKED. FIRE WAS EXTINGUISHED BY 7:00 PM. WATERING DOWN AND CLEAN UP OF AREA CONTINUED UNTIL 12:30 AM. FAN RESTARTED @ 1:00AM. INSPECTED SLOPE UNTIL 2:15AM. RESTORED POWER 2:55AM A FTER PRESHIFT OF MINE. WELDING EARLIER, BELT BUR