The Ryongmun T'an'gwang Line, or Ryongmun Colliery Line is an electrified railway line of the Korean State Railway in Kujang County, North P'yà Ângan Province, North Korea, running from à Âryong on the Manp'o Line to Ryongmun Colliery.
à Âryong Station on the Manp'o Line was opened on 1 May 1941, when the construction of a new line to the coal mines at Ryongmun began; the line, named the Ryongmun Colliery Line, was opened by the Chosen Government Railway on 1 September 1941.
Electrification of the line was completed by 1980.
A yellow background in the "Distance" box indicates that section of the line is not electrified.