高瓦斯含量低透气性突出煤层高效抽采瓦斯是复杂地质条件下工作面瓦斯治理的主要难题。为增加该类煤层透气性，依据瓦斯流量法测试水力冲孔影响半径的结果，利用煤层底板巷布置穿层密集钻孔，对工作面进行水力冲孔强化增透，达到高效预抽煤层瓦斯的目的。研究结果表明：水力冲孔在煤体中形成的孔洞促使钻孔周围煤体持续膨胀变形，约在1.8倍孔洞直径范围内煤体的地应力下降，煤体受压程度降低，煤体透气性增大；水力冲孔加速了煤体瓦斯的解吸，实现了连续18 d，平均单孔瓦斯体积分数大于52.64%的高浓度瓦斯预抽效果；预抽60 d后，煤层瓦斯含量由原始的9.09 m3/t降至4.03 m3/t。可见，采用密集穿层钻孔水力冲孔，提高了煤层预抽瓦斯效果，实现了低透气性突出煤层的消突，保障了工作面的安全生产。

Efficient gas extraction from outburst coal seams with high gas and low permeability is the main problem of gas control in working faces with complex geological conditions. In order to increase the permeability of this type of coal seam, based on the results of testing the influence radius of hydraulic punching by the gas flow method, the coal seam floor roadway was used to arrange dense drilling holes through the seam, and hydraulic punching was carried out on the working face to enhance and increase the permeability, so as to achieve the purpose of high-efficiency pre-extraction of coal seam gas. The research results show that the pores formed in the coal body by hydraulic punching promote the continuous expansion and deformation of the coal body around the borehole, the in-situ stress of the coal body decreases within the range of about 1.8 times the diameter of the pores, the compression degree of the coal body decreases, and the coal body permeability increases;hydraulic punching accelerates the desorption of coal body gas, and achieves the effect of high-concentration gas pre-drainage with an average single hole concentration greater than 52.64% for 18 consecutive days;after 60 days of pre-extraction, the coal seam gas content is reduced from the original 9.09 m3/t to 4.03 m3/t. It can be seen that the use of intensive drilling and hydraulic punching improves the effect of pre-draining gas in the coal seam, realizes the elimination of outbursts in outburst coal seams with low air permeability, and ensures the safe production of working faces.