O The incident occurred at 3:50 pm on Wednesday (7:50 am in Lisbon) when, according to a preliminary investigation, carriages traveling in an inclined tunnel collided, killing or injuring the workers in them, state television CCTV reported.
The 13 injured were sent to nearby hospitals for medical treatment.
The exact cause of the accident is still being investigated, state television reported.
At the end of November, a total of 11 workers died in an accident at a coal mine in the same province.
Last September, 16 people died in a fire at a coal mine in the city of Panzhou, in Guizhou province, in central China.
Coal mines – the fossil fuel from which China produces around 60% of its energy – continue to experience a high accident rate in China, although the number of fatal accidents has decreased significantly in recent years.
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