The incident happened early on Thursday at the Sizhuang mine in Yunnan province's Qujing city.
Hundreds of firemen, rescue teams and medical staff were at the site, a local government statement said.
The disaster comes days after another mine in Henan province experienced a rock burst, which trapped pit workers. Dozens were rescued but 10 were killed.
The official Xinhua news agency quoted officials as saying the latest accident happened at 06:25 (22:25 GMT, Wednesday).
At least 24 men are thought to be trapped but the exact number underground at the time of the incident remains unclear, the agency said.
State media described the incident as a "gas leak", but earlier reports referred to a "gas explosion".
China's mining industry has a terrible safety record, but officials say in recent years the number of deaths and injuries has fallen dramatically.
কোন মন্তব্য নেই:
একটি মন্তব্য পোস্ট করুন