EE PERFORMING MAINTENANCE ON NON-OPERATING FEED HOPPER/ JAW CRUSHER. ACCESS TO WORK AREA RESTRICTED REQUIRING EE TO STOOP AND CRAWL. UPON ENTERING THE WORK AREA THE EE STOOD UP, STRIKING ONE O F THE 4"" BY 4"" HORIZONTAL TUBE STEEL SUPPORTS OFTHE FEED HOPPERS WINGS. EE WAS WEARING A HARD HAT AND SAFETY GLASSES. EE SUFFERED ABRASIONS AND CONTUSIONS TO HIS FACE, AND LACERATION R EYE.