淮南矿区地处中国陆地东西构造带与南北构造带交汇的前端，地质构造极为复杂，经过一系列构造演化，导致煤体破碎、松软，具有高瓦斯、高地压、高地温、高承压水、松软低渗“四高一松软”的特征。随着淮南矿区开采深度逐年增大，瓦斯灾害的复杂性和危险性显著增加，井下瓦斯治理工程与生产接替之间的矛盾更加突出。煤矿瓦斯治理与煤炭开采密切相关，通过地面瓦斯治理井预抽煤矿瓦斯能有效扼制瓦斯灾害事故，提高煤炭安全生产效率。以煤矿5~10 a规划设计的开采区为单元，地面瓦斯治理井沿采煤工作面轨顺、运顺内错30~40 m钻进，覆盖设计的全部采煤工作面。采用三开完井方式、旋转下套管技术、酸性压裂液体系大规模压裂、有杆无杆排采工艺组合应用等手段，实现了工程成功率100%、压裂最高砂比20%、单井最高日产气量11 067 m³的效果。经煤矿井下验证，13-1煤层65、30 m范围内的原始瓦斯压力由6.8 MPa分别降至2.7、2.4 MPa，瓦斯由11.8 m³/t分别降至7.2、5.2 m³/t，地面瓦斯治理井压裂抽排对降低煤层瓦斯压力、瓦斯含量效果明显。实施地面瓦斯治理有利于煤矿安全生产、有利于优化能源结构、有利于碳减排，打造地面瓦斯治理示范区，对中国松软低渗煤层地质条件下实施地面瓦斯治理具有极大的借鉴意义。

The Huainan mining area is located at the forefront of the intersection of the east-west and north-south tectonic zones in China, with extremely complex geological structures. After a series of tectonic evolution, the coal seams have become fragmented and soft, characterized by “four highs and one softness”: high gas content, high formation pressure, high geothermal temperature, high confined water pressure, and soft and low-permeability coal. As the depth of mining in the Huainan mining area increases year by year, the complexity and hazard of gas disasters have significantly increased, leading to a more prominent contradiction between underground gas control engineering and production succession. Coal mine gas control and coal mining are closely related. Pre-extracting gas through surface gas control wells can effectively prevent gas-related accidents and improve the efficiency of coal safety production. Taking coal mining areas planned for 5 to 10 years as units, surface gas control wells were drilled along the coal mining working face following the track and transportation directions, with an offset of 30~40 m, covering all the designed working faces. Using a three-drilling completion method, rotary casing technology, large-scale fracturing with acidic fracturing fluid system, and drainage and production technology combined with and without sucker rod, the project achieved a 100% success rate, the highest sand ratio of 20% during fracturing, and the highest daily gas production of 11 067 m³ per well. Through verification in the underground coal mines, the original gas pressure in the 13-1 coal seam within the ranges of 65 m and 30 m reduced from 6.8 MPa to 2.7 MPa and 2.4 MPa, respectively, and the gas content decreased from 11.8 m³/t to 7.2 m³/t and 5.2 m³/t, respectively. The fracturing and drainage technology of surface gas control wells had significant effects on reducing the gas pressure and gas content of the coal seam. The implementation of surface gas control technology is beneficial to coal mine safety, energy structure optimization, and carbon emission reduction. Establishing a demonstration area for surface gas control offers valuable insights for implementing surface gas control technology in soft and low-permeability coal seams under geological conditions in China.