A DOZER OPRATOR WAS WORKING/PUSHING COAL TOWARD A LOADOUT SPOT FOR THE FRONT END LOADER WHERE IT COULD BE PICKED UP AND DUMPED INTO THE HOPPER FOR THE PREP PLANT. AS HE WAS PUSHIGN COAL, HE N OTICED STEAM/SMOKE COMING FROM THE COAL PILE. AT APPROX 11:45 PART OF THE COAL PILE WHICH HAD BEEN OPENED UP AND EXPOSED TO AIR BY THE DOZER, COMBUSTED INTO FLAMES. THE DOZER OPERATOR PROCEE