“爆刻技术”在岩壁梁部位开挖中的研究与应用

结合向家坝水电站岩壁梁部位工程地质条件和设计轮廓复杂、质量要求高的特点，施工中首次提出了“爆刻技术”这一新的爆破技术术语和理念。详细介绍该项技术的施工程序、施工方法、控制爆破设计和具体的施工工艺及爆破振动观测。施工中推行的精细化科学管理措施，确保了岩壁开挖成型质量优良，创造了光爆孔半孔率近100%、岩台平均超挖2.9cm的新纪录。

Study and Application of Blast Forming Technology in Excavation of Rock-bolted Crane Girder

The rock-bolted crane girder of Xiangjiaba Hydropower Station has poor geologic conditions,complex design profile and high quality requirements.Blast forming technology is established and applied for the first time in the construction of the rock-bolted crane girder of the hydropower station.In this paper,the authors present the construction sequence,construction method,controlled blasting design,construction technology and blasting vibration observation in detail.With the above measures and scientific mana...