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什么是水力沖孔?

作者:煤礦安全網 2015-08-21 11:05 來源:煤礦安全網

什么是水力沖孔?

答:水力沖孔是在安全巖(煤)柱的防護下,向煤層打鉆后,用高壓水射流在工作面前方煤體內沖出一定的孔道,加速瓦斯排放。同時,由于孔道周圍煤體的移動變形,應力重新分布,擴大卸壓范圍。

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