Advancing hole is one of local prevent outburst measure at coal road heading face in coal-and-gas outburst mine.

超前钻孔是煤与瓦斯突出矿井中煤巷掘进工作面的局部防突措施之一。

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Advancing hole is one of local prevent outburst measure at coal road heading face in coal-and-gas outburst mine.

超前钻孔是煤与瓦斯突出矿井中煤巷掘进工作面的局部防突措施之一。

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