引松供水工程4标段饮马河调压井深50 m，直径为20 m，为圆柱形竖井结构。主要岩性为凝灰质砂岩，竖井井口地形陡峭、环境复杂，便道及施工场地布置困难，大型设备很难进入，施工难度非常大。为解决因边界条件复杂而造成施工方案选择困难的问题，通过资料查阅、国内外现有竖井方案调研、专家咨询等方法，多方案反复比选评审，大胆试验，提出并试验成功超大断面超深孔反向爆破成井技术，特别是对爆破分区、爆破方案及关键施工工艺等方面进行了深入研究，得出了一系列理论及参数，在施工条件极为困难的情况下，为本工程的顺利实施打下了坚实的基础。

Yinmahe surge shaft in No. 4 bid section of Songhuajiang River Water Conveyance Project is a cylindrical vertical shaft with 50 m depth and 20 m diameter. The shaft is located in tuffaceous sandstone. Due to the steep landforms and complex conditions at the ground surface around the shaft, it is very difficult to establish the access roads and construction sites for the shaft, and it is very difficult to mobilize the heavyduty equipment to the site. After extensive literature survey and study, raise boring method is adopted for the shaft. In the paper, the technologies for the raise boring technologies, including the blasting zone division, blasting scheme and key blasting techniques, are presented. In the end, the shaft has been completed successfully.