南掌河电站引水隧洞工程开挖爆破的设计与施工

Design and construction of diversion tunnel excavation blasting for Nanzhanghe HPP

简介云南陇川县南掌河电站引水隧洞的工程地质特性,通过分析计算和施工现场试验,确定了光爆参数、炮眼布置和炸药用量,提出了隧洞开挖爆破的设计方法和施工要求,介绍全断面光面爆破法在小断面隧洞开挖爆破中的应用和爆破设计中关键参数确定,以及施工情况、结果等。

A brief introduction is made on the engineering geology characteristics of the diversion tunnel of Nanzhanghe HPP at Longchuan county of Yunnan province. By analysis, calculation and construction site test, the smooth blasting parameters, the layout of blast holes and the explosive charge were determined;the design method and construction requirements for tunnel excavation blasting were put forwatd, the author also introduced the application of full-section smooth blasting in the excavation blasting of small-section tunnels, the determination of key parameters during blast design, the construction practice and results etc.