A new construction method is analysed,that is to construct a dam for intercepting flood and storing water in the earlier stage of a project,and pouring water into the thrown pole for consolidation,and sinking soil into water to add to the dam by using directional blasting.

The strucutral charateristics and mechanism of percolation stability of a directional blasted dam are analayzed and investigated, the antiseep principle of directional blasted dam is put forward, the proposals on constructing a retaining dam at a suitable site according to the excellent percolation stabilidy of directional blasted dam are given.

The technology of directional blasting applied on the demolition of a thin brick water tower;

The technology problems of blasthole depth,cutting blasting,smooth wall blasting,and directional blasting is discussed.

We often arrange linear charge in design of directional blasting.