Eight people had been confirmed killed by Thursday’s accident at the Qianqiu colliery in the central province of Henan, it said. Another 21 had earlier been brought out.
While mining accidents are common in China, it is unusual for so many people to be successfully brought to the surface alive. The operation is the most successful such effort in the country since April 2010, when 115 miners were rescued after eight days trapped underground at a mine in northern China.
The incident was the latest to hit the hazardous mining industry in China, and came days after a gas explosion at a state-owned coal mine in neighbouring Hunan province left 29 miners dead.
In 2010, 2,433 people died in coal mining accidents in China, according to official statistics .
China is the world’s leading consumer of coal, relying on it for 70 percent of its growing energy needs.