Jiulong Mine, Jizhong Energy Fengfeng Group Handan Baofeng Mining Co., Ltd.

为有效治理九龙矿15249N工作面大采深煤层突出危险性，采用“一穿两探”治理瓦斯措施。该项目实施以来，使预抽区域煤层瓦斯含量降低至4 m3/t以下，瓦斯压力降到了0.23 MPa。提升了瓦斯治理效果，缩短了区域瓦斯治理时间，降低了瓦斯超限事故的发生，加快了煤巷掘进速度，该技术在大采深突出煤层瓦斯治理中具有广泛的应用推广价值，探索出2号煤层大采深突出危险区综合瓦斯治理体系，确保了工作面安全高效生产。

In order to effectively control the outburst danger of large mining depth coal seam in 15249 N working face of Jiulong Mine, the gas control measures of " one-through and two-exploration " are adopted. Since the implementation of the project, the gas content of the coal seam in the pre-drainage area has been reduced to less than 4 m3/t, and the gas pressure has been reduced to 0.23 MPa. It improves the effect of gas control, shortens the time of regional gas control, reduces the occurrence of gas overrun accidents, and accelerates the tunneling speed of coal roadway. This technology has a wide range of application and promotion value in gas control of outburst coal seam with large mining depth. The comprehensive gas control system in the outburst danger zone of No.2 coal seam with large mining depth is explored to ensure the safe and efficient production of the working face.

于洪喆. 2号煤层大采深突出危险区“一穿两探”瓦斯治理技术研究[J]. 煤炭与化工, 2023, 46(10): 132-136.

Yu Hongzhe. Study on gas control technology of' one-through and two-exploration' in large mining depth outburst dangerous area of No.2 coal seam. CCI, 2023, 46(10): 132-136.