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燃化部于1974年2月27日至3月4日,在南桐矿务局召开了“在无解放层条件下利用水力冲孔防止煤与瓦斯突出试验”的总结会议。根据1403试验区提供的实践资料,肯定了水力冲孔消除煤与瓦斯突出的有效作用,总结了水力冲孔由点到线,由线到面即从揭石门、煤巷掘进到大面积回采过程的全
From February 27 to March 4, 1974, the Bureau of Combustion and Combustion held a wrap-up meeting at Nantong Mining Bureau to prevent coal and gas outburst from using hydraulic punching in the condition of no liberating strata. According to the practical information provided in the 1403 experimental area, the effective function of hydraulic punching to eliminate coal and gas outburst is affirmed. The hydraulic punching is summarized from point to line, from line to surface, ie from steep stone gate and coal lane to large area recovery process The whole