The injured was in the process of loading curtain boards on the return side bolter located in Entry #1, S.S. 2+70 of Unit #1. When a piece of roof rock measuring 27"" X 12"" X 2"" fell from the mine roof striking the employee on top of his hard hat. The injured finished his shift on 10/10/2007. On 10/11/2007 the injured sought medical attention, diagnosed with a neck strain.