GRAFTON, W.Va. (AP) — A coal miner died Friday, nearly a week after being injured on the job in northern West Virginia, officials said. Colton Walls, 34, of Bruceton Mills, was injured while working as a longwall electrician at the underground Leer Mining Complex operated by Arch Resources in Grafton, Gov. Jim Justice said in a statement. According to the U.S. Mine Safety and Health Administration, the incident happened Sept. 28. Walls is surv…