CRUDE ORE HAD SPILLED OFF N302 BELT ONTO FLOOR IN BASEMENT. EMPLOYEE WAS SHOVELING ORE FROM FLOOR BACK ONTO BELT AND FELT A SHARP PAIN IN HIS LOWER RIGHT ABDOMEN AREA (ABDOMEN STRAIN). EE DID NOT THINK IT WAS SERIOUS AND WANTED TO WAIT TO SEE IF IT WOULD GET BETTER BEFORE GOING TO DOCTOR. EE WENT TO DOCTOR ON JUNE 18, 2004.