2/17/2015 EE was working with another miner carrying an auger up to the top of a product silo under Maint./Repair. EE completed his shift on 2/17/15, but on 2/18/15 notified his Supervisor of lower back pain. EE was seen by a phys. and was treated for a strained back; placed on lifting/bending restrictions until cleared to return to full duty.