复杂条件下的地下厂房岩壁梁岩台开挖爆破实践

Excavation and Blasting of Rock Bench for the Beams of Underground Powerhouse with Complex Conditions

白莲河抽水蓄能电站地下厂房岩锚梁开挖施工过程中,针对节理、裂隙较发育且地质构造复杂的特点,采用预留保护层分区、分步开挖方法,通过调整爆破参数和施工方法进行了多种方案的现场试验,确定了优化的开挖方案和爆破参数,取得了较好的爆破质量,积累了工程经验。

During the excavation of rock anchorage beam in the underground powerhouse of Bailianhe pumped storage power station, the methods of excavation in different areas and different steps with the preserved protection layer were adopted, taking into account the developed joints and fissures and the complicated geologic structures. Through optimizing excavation program and blasting parameters by many blasting experiments of adjusting the blasting parameters and construction methods, we have achieved preferable blasting quality and accumulated engineering experience.