Eleven miners were trapped when rainstorm-triggered floods rushed into a colliery in north China's Shanxi Province, local officials said on Monday.
Flood waters entered the Makulue colliery in Xingxian County of Luliang city on Sunday.
An official with the city government said it's still unclear whether the 11 trapped are till alive, Xinhua news agency reported, a day after reporting two other coal mine accidents.
Two water pumps have drained water in the shaft and workers are busy installing four mud pumps.
A total of 1,792 coal miners died in 1,066 mishaps in China, the world's top coal producer and consumer, during the first half of this year.
In 2006, coal mine accidents killed 4,746 people in China in 2006 with an average of 13 deaths per day.