WHEN COAL WAS PUSHED ON TOP OF FEDDER, THE DOME COLLAPSED ALLOWING METHANE TO ENTER THE ENGINE COMPARTMENT OF THE D-10-L DOZER. THE METHANE WAS IGNITED FROM THE DIESEL ENGINE EXHAUST SYSTEM CAUSING THE DOZER TO BECOME ENGULFED IN FLAME. THE DOZER OPERATOR RECEIVED BURNS TO BOTH FOREARMS AND LEFT SIDE OF FACE.