蒲石河抽水蓄能电站上库趾板建基岩面开挖爆破地震试验成果分析
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摘要
对蒲石河抽水蓄能电站上库趾板建基岩面开挖区域中地质条件具有代表性的地段进行了单孔爆破地震测试。结果表明,试验获得的爆破地震强度计算公式可以应用于现场爆破施工最大段药量计算,试验参数可以用于本段工程施工,但爆破施工不宜采用大抵抗线、掘沟、掏槽、药壶等爆破方式,这些爆破方式对炸药能量释放夹制力大,对保留岩石破坏影响大。
The seismic testing on single-hole blasting is made in the location with the representative geological condition within the excavation area of the rock foundation for the toe slab of the upper reservoir of Pushihe Pumped Storage Hydropower Station.The testing result shows that the calculation formula for the seismic intensity caused by blasting obtained from the testing can be applied to the calculation of the maximum charge of one section for the blasting construction on site and the testing parameters can be used for the blasting of this section.However,the blasting methods such as larger repellence line,trenching,cutting,springing,etc.,as those methods have larger clamping force on the energy release of explosive with a large breaking impact on the remained rock.
The seismic testing on single-hole blasting is made in the location with the representative geological condition within the excavation area of the rock foundation for the toe slab of the upper reservoir of Pushihe Pumped Storage Hydropower Station.The testing result shows that the calculation formula for the seismic intensity caused by blasting obtained from the testing can be applied to the calculation of the maximum charge of one section for the blasting construction on site and the testing parameters can be used for the blasting of this section.However,the blasting methods such as larger repellence line,trenching,cutting,springing,etc.,as those methods have larger clamping force on the energy release of explosive with a large breaking impact on the remained rock.
引文
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