This is the recent incident in a string of mine-related incidents after four mine explosions killed dozens across the country in less than three months. Gas detonated in late September at a mine in northwest China`s Ningxia Hui Autonomous Region killing at least 18 people.
Another blast in the central Chinese region of Chongqing in early November claimed 33 lives, while two explosions near the cities of Chifeng and Qitaihe left at least 38 dead last week.
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