论文部分内容阅读
当前在隧道、矿山的井、巷和水电涵洞的建设中,仍然以凿岩爆破工艺为主要手段。要做到一次爆破进尺多,炮眼利用率高,改善和提高掌子面的掏槽爆破是最关键的。掏槽形式有楔形掏槽和直眼掏槽两种。实践证明直眼掏槽有较大的优越性。我们在成昆线官村坝隧道做了一系列直眼深眼掏槽的实验,初步搞清了掏槽爆破的基本规律和掏槽炮眼的设计原则。官村坝隧道岩体为震旦纪石灰岩(f=10～12)。巷道开挖爆破采用五点梅花直眼掏
Currently in the tunnels, mines wells, lanes and hydropower culverts in the construction, still with rock drilling blasting as the main means. To do a blasting footage, blasthole utilization rate is high, improve and improve the dough blasting face is the most critical. Cut in the form of a wedge cut and straight cut two. Practice shows that straight-eye cut has greater superiority. We conducted a series of straight-eye deep undercut experiments in Guantanba tunnel of Cheng-Kun line. The basic rules of undercutting blasting and the design principles of undercutting blasthole were preliminarily found out. Guancunba tunnel rock is Sinian limestone (f = 10 ~ 12). Roadway excavation blasting using five plum straight eye dig