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| Study on gas control technology of' one-through and two-exploration' in large mining depth outburst dangerous area of No.2 coal seam |
| Yu Hongzhe |
| Jiulong Mine, Jizhong Energy Fengfeng Group Handan Baofeng Mining Co., Ltd., Handan 056500, China |
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Abstract 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.
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