Application of Small Diameter Diamond Drilling in Curtain Grouting for a Hydropower Station

Abstract:

By an engineering case of small diameter diamond drilling in Dagangshan hydropower station, the paper summarizes the construction technology of small diameter diamond drilling in hard formation. The description includes the choice of equipment machinery, construction technology, the determination of the relevant parameters, common problems in drilling and prevention measures. And analysis is made on the borehole deviation according to plane projection drilling track.