THE EE WAS ROLLING A LARGE ROCK OUT OF THE HAULAGE WAY AND FELT A ""PULLING"" SENSATION AND PAIN IN HIS LOWER ABDOMEN. HE REPORTED TI TO HIS SUPERVISOR. HE WORKED SEVERAL OVERTIME SHIFTS AND IT CONTINUED TO GET WORSE. HE WAS SEEN IN ER ON 8-8-200 AND DIAGNOSED AS A HERNIA AND REFERRED FOR SURGICLA REPAIR.