EMPLOYEE WAS WORKING BELOW A BROW THAT HAD BEEN CHIPPED BACK. MATERIAL CAME LOOSE, FELL AND HIT EMPLOYEE'S HARD HAT, KNOCKING IT OFF. ANOTHER ROCK FELL HITTING EMPLOYEE'S HEAD WHILE HARD HAT W AS STILL OFF, CUTTING EMPLOYEE'S SCALP - NEEDING TWO STAPLES. THE AREA WAS SCALED DOWN AND ALL EMPLOYEES ADVISED TO WATCH THIS AREA.