A gas blast in a pit owned by Pingyu Coal and Electric in the central province of Henan, China, has left 37 people dead.
A total of 276 miners were at work below ground when the accident happened early on 16 October, and 239 people made it to the surface.
About 300 rescue workers were involved in operations to evacuate the trapped and missing miners.
The rescue was hampered by more than 2,500t of coal dust, which smothered the pit after the gas leak.
An initial investigation showed that 173,500m3 of gas leaked in the accident.