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焦作矿务局九里山煤矿为解决煤巷掘进防突问题，在总结、分析原防灾措施实施效果的基础上，提出了采用穿层预抽与排放孔相结合的防突措施，取得了显著效果
Jiu Lishan Coal Mine, Jiaozuo Mining Bureau In order to solve the problem of gas outburst in coal tunneling, on the basis of summarizing and analyzing the effect of the original disaster prevention measures, the measures to prevent outburst were put forward, effect