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加拿大Daniel Johson水电站(装机容量为4×25万千瓦)的地下厂房,布置在坚硬的花岗岩中,总开挖量为33万余米~3(实方)。岩石开挖采用钻爆法,使用了Cardner-Denver公司专门为该电站施工制
The underground powerhouse at Daniel Johson Hydropower Station in Canada (with an installed capacity of 4 × 250 MW) is placed in hard granite with a total excavation of 330,000-300 square feet. Drilling and blasting was used for rock excavation, and Cardner-Denver Company was used to construct the power station