19A, USING CENTER BOLTER TO SUPPORT CUT THRU INTO OVERCAST ENTRY. HE HAD INSTALLED LEFT HAND BOLT AND CENTER BOLT AND WAS INT HE PROCESS OF INSTALLING FINAL BOLT INT HE RIGHT SIDE WHEN ROCK BR OKE AND FELL. THE ROCK ENDED UP FALLING OUTBY STRIKING RIGHT LEG, ANKLE AND FOOT. LOST DAYS BEGAN 4-22-02.