为有效减少煤层瓦斯含量，实现瓦斯资源的高效利用并降低井下瓦斯治理难度，结合首山一矿现场地质特征，构建了地面井分区式瓦斯抽采技术，旨在实现矿区瓦斯治理体系化。基于采矿活动的时空分布特征，将井田划分为未采区、采动区和采空区，分区建立不同地面井进行瓦斯抽采，实现瓦斯治理向瓦斯利用并重转变。体系化瓦斯治理技术包括地面井井位科学布置、井身结构及施工设计、未采区储层压裂增透和排采与集输工程4部分。综合考虑空间层位、煤层特征、地面位置、煤层回采和瓦斯赋存条件进行地面井井位选取。在采动区，基于煤层回采后垮落带和裂隙带高度，设计采动区直井和L型井井底层位分别位于裂隙带中上部，借助本煤层回采的卸压效果，实现区域内多煤层瓦斯高效抽采。设计了未采区L型井井身、采动区直井井身、采动区L型井井身和采空区直井井身。对未采区煤层进行水力压裂实现煤层增透，选用定向射孔+泵送桥塞式光套管压裂的复合压裂工艺进行煤层压裂，采用深穿透加强弹进行射孔作业，支撑剂采用0.841/0.42 mm石英砂。在首山一矿进行地面井分区式瓦斯抽采技术工程实践，统计了矿区内不同类型地面井瓦斯抽采情况，结果显示：采动区地面井单井瓦斯日产量最高可超过4万m3，单井累计瓦斯抽采量高达259.7万m3，井田区域内目前在抽钻井11口，累计抽采量高达1 425.2万m3。现场效果检验表明实施地面井分区式瓦斯抽采技术可实现瓦斯的高效抽采，形成了“采一层治多层”的瓦斯治理模式。

In order to effectively reduce the gas content of coal seam, realize the efficient utilization of gas resources and reduce the difficultyof underground gas management, combined with the geological characteristics of Shoushan I mine site, we built a surface well zoninggas extraction technology, aiming to realize the systemization of gas management in the mine area. Based on the spatial and temporaldistribution characteristics of mining activities, the mine field was divided into unmined area, mined area and vacant area, and differentsurface wells were established for gas extraction in zoning, so as to realize the change from gas management to gas utilization. The systematicgas management technology includes four parts: scientific arrangement of surface wells, well structure and construction design, reservoirfracturing and permeability enhancement in unmined area, and drainage and gathering engineering. The selection of surface well locationsis based on the spatial stratification, coal seam characteristics, surface location, coal seam recovery and gas storage conditions. In themining area, based on the height of the collapse zone and fissure zone after coal seam retrieval, the straight wells and L-type wells in themining area were designed to be located in the middle and upper part of the fissure zone, so that the gas can be extracted efficiently frommultiple coal seams in the area with the effect of pressure relief of this coal seam retrieval. The L-shaped well body in the unmined area,the straight well body in the mined area, the L-shaped well body in the mined area and the straight well body in the mined area were designed. Hydraulic fracturing of the coal seam in the unmined area to achieve coal seam penetration increase, the composite fracturing processof directional injection & pumped bridge plug type light casing fracturing was selected to fracture the coal seam, deep penetration reinforcingbullet was used for injection operation, and 20/40 mesh quartz sand was used as proppant. In Shoushan No.1 Mine, the engineeringpractice of surface well zoned gas extraction technology was carried out, and the statistics of gas extraction from different types of surfacewells in the mine area showed that: the maximum daily gas production from a single well in the mining area can exceed 40 000 m3,and the accumulated gas extraction from a single well is up to 2 597 000 m3, and 11 wells are currently being drilled for extraction in thewell field area, with an accumulated extraction of up to 14 252 000 m3. Field effect test showed that the implementation of surface wellszoned gas extraction technology can achieve efficient gas extraction, forming a gas management model of “mining one layer to treat multiplelayers”.