白鹤滩水电站深孔分段爆破法在竖井导井施工中的技术应用

Technical application of deep-hole sectional blasting to construction of pilot well for shaft of Baihetan Hytropower Station

由于地质条件复杂,白鹤滩水电站竖井工程施工过程中安全风险较高,严重制约施工进度。为保证施工工期和工程安全,通过采取竖井导井深孔分段爆破法进行施工,取得了较好的效果。在具体介绍了主要施工程序、施工要点和爆破参数等基础上,分析了该爆破法产生的经济效益。研究成果可为深孔分段爆破法在竖井施工中的应用提供参考。

For the construction of the shaft for Baihetan Hydropower Station,the safety risk is relatively higher due to the complicated geological condition therein and large construction interference therein,which seriously restricts the construction progress. In order to ensure the construction time limit and the controlled safety,the method of the deep-hole sectional blasting for the construction of pilot well of shaft is adopted and better result is obtained. The main construction procedures and points aa well as the blasting parameters are specifically described herein,and then the economic benefits got from the blasting method are analyzed as well. The study result can provide references for the application of deep-hole sectional blasting to shaft construction.