The accident happened around 1 p.m. Sunday in the Beiyu Coal Mine in Puxian county in the city of Linfen, Xinhua reported.
Seven miners were trapped in the shaft, said a spokesman with the county government.
Rescuers were searching for the remaining three miners, the news agency said.
Beiyu Coal Mine is owned by Shanxi Puxian County Hongyuan Group.
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