Miner checking HG Sprocket area for rib bolt. Upper & lower doors open, upper door put back, not seated. Injured contractor put the lower door in place, reached up & grabbed the pin/anchor tab. Tab slipped off the lug pinching finger between tab and lug. Wound was cleaned & EE refused further trtmnt. On 3/26, we found that EE visited the ER after the incident & received sutures.