Miner was lowering a 6' ladder into the feeder breaker when he felt pain in his lower back. Miner was seen at the clinic & returned to work w/o restrictions. On 4/11/16, Mine was 1st notified that miner had seen a dr for his back pain at the end of Feb. On 4/14/16, Mine was further notified that miner had been prescribed a steroid pack & had undergone an MRI & had an injection.