煤—水双资源矿井
Coal-water double-resources mine
本质安全型矿井
intrinsically safe coal mine
intrinsically safe mine
高产高效矿井
High Output and High Efficiency Mine
high yield and high efficiency mine field
High output and high profit mine
高瓦斯矿井
highly gassy mine
High-gas Coal Mine
Mine with High Gas Content
rich gas coal mine
High-gassy mine
高瓦斯突出矿井
high gas and outburst mine