INJURED WAS ASSISTING THE BELT MOVE CREW IN THE PROCESS OF ADVANCING THE BELT ON SECTION. HE WAS OPERATING A SCOOP; USING A CHAIN TO PULL THE TAIL PIECE BACK WHEN THE CHAIN BROKE AND HIT HIM I N THE MOUTH. HE SUSTAINED A LACERATION TO HIS MOUTH AS A RESULT. HE WAS TAKEN TO THE HOSPITAL AND RECEIVED TWO STITCHES.