EE & ANOTHER OPERATOR WAS TRYING TO BREAK A CHUNK OF TONA ORE ON THE BELT UNDER CP 2110 STOCKPILE RECLAIM FEEDER. EE WAS HOLDING A BAR PLACED AGAINST THE CHUNK OF ORE WHILE THE OPERATOR ATTEMP TED TO BREAK THE CHUNK BY HITTING THE OPPOSITE END OF THE BAR WITH A SLEDGE HAMMER. THE HAMMER GLANCED OFF OF BAR HITTING EE ON RT SHOULDER LD TIL SURGERY ON 8-30-02.