EMPLOYEE WAS ROOF BOLTING ON UNIT 3. HE WAS INSTALLING A ROOF BOLT INTO THE HOLE, THE ROOF BOLT LODGED CAUSING IT TO BEND & STRIKE HIS RT. HAND & WRIST. THE INCIDENT CAUSED A FRACTURE TO THE RT. WRIST. THIS INCIDENT IS UNDER INVESTIGATION PENDING THE DR.'S REPORT. EE MUST KEEP HANDS CLEAR FROM PINCH POINTS.