光面爆破技术在复杂地质隧洞开挖中的应用

The Application of Smooth Blasting Technology to Tunnel Excavation in Different Geological Conditions

根据勐野江水电站隧洞围岩岩体类别差异性大的特殊地质条件,采用工程类比和现场试验法,研究复杂地质条件下隧洞光面爆破的爆破参数、炮孔布置、装药结构、起爆网路、施工方案及处理措施。研究结果表明,在复杂地质条件下进行洞室开挖,只要选择正确的爆破参数和合理的施工方法也可以取得良好的爆破效果。

According to the special geological conditions of the big difference in the surrounding rock cat- egories in Meng Yejiang hydropower station＇ s tunnel, the paper took the measure of engineering analogy and site test, and proposes tunnel-controlled blasting parameters, blast hole layout, explosive loading structure, priming circuit, construction schemes and resolution in the complex geological conditions of tunnel excavation blasting. The result shows that as long as the correct choice of blasting parameters and reasonable construction methods, the cavern excavation in complex geological conditions can achieve a good blasting effect.