EMPLOYEES WERE GROUTING 30' CABLE BOLTS, PUMPING GROUT TO THE TOP OF THE HOLES USING 7/8 X 3/4 POLY TUBE AND GROUT PUMP. SECTION OF TUBE OUTSIDE OF BOLT HOLE FAILED (RUPTURED) CAUSING GROUT TO SPRAY INTO INJURED EMPLOYEE'S EYES. HE WAS WEARING SAFETY GLASSES AT THE TIME.