药室导洞的良好堵塞,是保证岩塞爆破成功的一个重要环节。一般来说,对于平洞的堵塞和斜洞、竖井的向下堵塞,在技术上是比较简单的,而对于斜洞或斜井的向上堵塞,则往往比较困难,二五○工程在岩塞爆破施工中碰到的就是后一种情况。本文作者曾直接参加过二五○工程的水下岩塞爆破工作。——编者二五○工程水下岩塞爆破药室导洞是两个倾角为60°的斜洞,共长10米,设计断面为120×160厘米和100×100厘米(见图1),由于地质条件和施工上的 The good blockage of the guide hole in the medicine room is an important link to ensure the success of the rock plug explosion. In general, for the blockage of flat holes and slanting holes, the vertical blockage of the shaft is technically relatively simple, while it is often difficult to block the inclined holes or inclined shafts upward. Blasting encountered in the construction of the latter case. The author of this paper has directly participated in the underwater rock burst work of the 250th Project. - Editor’s Choice 250 Engineering Submerged Rockbolt Demolition Pharmacy The pilot tunnel is two inclined caves with a 60 ° inclination and a total length of 10 m. The design cross section is 120 × 160 cm and 100 × 100 cm (see Figure 1) Due to geological conditions and construction