THE INJURED WAS BOLTING ON THE MINER AND WHEN THE COUPLER ON A ROOF BOLT CAUGHT ON THE STRAP AS HE WAS PUSHING IT UP IN THE HOLE. HE PUT HIS HAND AGAINST THE BOLT TO PUSH IT INTO THE HOLE. HE STILL HAD THE UP PRESSURE ON THE BOLT AND IT BENT. HIS INDEX FINGER WAS CAUGHT BETWEEN THE BOLT AND THE TIMBER JACK FRACTURING HIS FINGER.