预裂爆破技术在乐滩水电站工程中的应用

乐滩水电站扩建工程基础开挖不仅工程量大、工期紧，而且临近旧厂坝，下挖深度大，搞好预裂爆破施工。是加快开挖施工进度、实现基础开挖工程安全和质量目标的保证。通过预裂爆破试验，选定合理的爆破参数，应用于高边坡的竖直预裂爆破及建基面的水平预裂爆破，取得了理想效果。

Application of Presplit Blasting Technology in Letan Hydropower

Considering the large foundation excavation quantity and tight time schedule, as well as the deep down excavation near the existing plant site, the presplit blasting is regarded as the key factor in speeding up the construction progress and ensuring the project safety and quality. The appropriate blasting parameters are defined through presplit testing to apply to the vertical presplit blasting for the high slope and the horizontal presplit blasting for foundation surface in the project. The result is satisfactory.