中深孔药壶爆破在忠和至海石湾高速公路石方开挖中的应用

Application of Deep-hole Springing Blasting Technology in Cutting Excavation of Zhonghe to Haishiwan Highway

介绍了中深孔药壶爆破方法在兰州忠和至海石湾高速公路石方开挖中的应用实例,采用了合理的爆破参数设计方法、药壶安全校核方法和钻孔控制技术,使药壶爆破的安全性和成功率大大提高,本工程所取得的经验对于同类工程具有借鉴价值。

An example of the application of deep-hole springing blasting technology in cutting excavation of Zhonghe to Haishiwan highway is introduced in this paper, The design of blast-hole arrangement, blasting parameters,two checking methods of the minimum safety distance among adjacent charges in multi-hole springing blasts, some key drilling parameters and hole-spacing correction formulas has been presented. The application of the above design and correction methods can prevent the collapse or linking up of adjacent cavities so as to be able to heighten the safety of deep-hole springing blasts. Some experiences obtained are useful for the similar projects.