HE WAS HELPING THE CONTINUOUS MINER ON A PILLAR SECTION WHEN THE POWER WENT OFF OF THE MACHINE. HE WENT TO THE REAR END OF THE MINER TO SEE IF THE BREAKER HAD KNOCKED AND A ROCK (APPROX. 57"" X 78"" X 15"" THICK) FELL TRAPPING HIM BETWEEN THE MINER AND THE ROCK.