There are 42 mine wells in four major mine areas,Jixi,Hegang,Shuangyashan and Qitaihe,in Heilongjiang province,China,70%of which are high gas mine wells.

• 黑龙江鸡西、鹤岗、双鸭山和七台河4大主要矿区有矿井42个,其中70%25都是高瓦斯矿井。