EE WAS TRYING TO UNTANGLE A PULL CABLE FROM BENEATH AND ADJACENT RR CAR. THE CABLE WAS BEING PULLED BY A D9 DOZER. THE DOZER OPERATOR DID NOT SEE THE EMPLOYEE AND PULLED THE DOZER FORWARD, THU S PUTTING TENSION ON THE CABLE. THE CABLE PINNED THE EMPLOYEE TO THE SIDE OF THE RR CAR INJURING HIS STOMACH AND BACK. THE DOZER OPERATOR LOOKED BACK AND IMMEDIATELY RELEASED TENSION ON CABLE