A total of 221 miners were underground when the accident at the Dongfeng coal mine near Qitaihe city in Heilongjiang Province occurred on 27 November.
The official Xinhua state news agency says 74 miners have been rescued.
An investigation has been launched into the cause of the explosion.
Chinese mines are among the most accident-prone and deadliest in the world, with thousands of fatalities reported each year.
(AP/AFP)
