In coal mine gas extraction in China, the current hydraulic permeability enhancement measures generally have complex processes, low adaptability, long operation time, and high labor intensity. This makes it challenging to meet the requirements of coal mining enterprises for safe and efficient mining, and there is an urgent need to develop new technologies to enhance gas extraction and production. This paper proposed an integrated drilling and stamping technology to enhance gas extraction and production and integrates drilling, hydraulic jet fracturing, and hydraulic punching to enhance the permeability of coal seams. A field test was conducted using the specially-developed integrated drilling and stamping equipment to extract gas from the 16101 bottom pumping lane penetration hole in the Jiulishan Mine, Jiaozuo, Henan. The test results show that compared with the hydraulic punching technology previously used in the mine, the punching time of the soft coal seam was shortened by 66–75%, the coal output was increased by 1.7 times, and the punching hole aperture was increased by 1.3 times. Hydraulic injection fracturing was successfully performed to increase the permeability of the hard coal seams, and the fracturing formed a shot hole depth of 345–539 mm. After the integrated drilling and stamping of the drill holes, the coal output, gas extraction concentration, pure gas extraction volume, and coal seam permeability coefficient increased by 2.4, 2.2, 4, and 37.3 times, respectively. The gas flow decay coefficient of the drills holes was also further reduced, which significantly improved the extractionefficiency. Thus the integrated drilling and stamping technology can transform the process of gas extraction from regular extraction to quick, economic, pure, and clean extraction. Thus, this technology has large applicable value for underground gas management in coal mines.

在我国煤矿瓦斯抽采中，目前的水力增渗措施普遍工艺复杂、适应性不强、作业时间长、劳动强度大。这使得满足煤矿企业安全高效开采的要求具有挑战性，迫切需要开发新技术来提高瓦斯开采和生产能力。提出了提高瓦斯抽采和生产能力的钻井和冲压一体化技术，将钻井、水力喷射压裂和水力冲孔一体化提高煤层的渗透率。河南焦作九里山矿16101底抽巷贯通孔利用专门研制的钻冲压一体化设备进行了现场抽采试验。试验结果表明，与矿山以往采用的液压冲孔技术相比，软煤层的冲孔时间缩短了66-75%，煤炭产量提高了1.7倍，冲孔孔径增加了1.5倍。 1.3 倍。水力喷射压裂成功提高了硬煤层的渗透率，压裂形成了345～539 mm的炮孔深度。钻孔一体成型后，煤产量、瓦斯抽采浓度、纯瓦斯抽采量、煤层渗透系数分别提高2.4倍、2.2倍、4倍和37.3倍。钻孔的气流衰减系数也进一步降低，显着提高了抽采效率。因此，钻冲压一体化技术可以将瓦斯抽采过程从常规抽提转变为快速、经济、纯净、清洁抽提。因此，该技术对煤矿井下瓦斯治理具有较大的应用价值。