煤与瓦斯突出矿井 meaning in Chinese

coal and gas outburst mine

General layout and mining process of coal and gas outburst
煤与瓦斯突出矿井的总体布局和采煤工艺
Discussion on regular relay of stope faces in coal mines with coal and gas outburst
谈煤与瓦斯突出矿井回采工作面的正常接替
According to the report , local safety inspectors at the end of last year warned mine bosses of high levels of gas concentrations in the shaft
据悉，发生事故的高桥煤矿曾于2007年底被煤监部门鉴定为煤与瓦斯突出矿井。目前，矿难的具体原因仍在调查之中。