Use of trench and pit crater charges at the construction site of the Hoa-Binh hydro development

Conclusions

• 1. Crater blasting by trench and pit explosive charges made it possible in the shortest time to open and subsequently eliminate the cofferdams of the diversion canal at the construction of the Hoa-Binh hydro development.

• 2. For using the available experimental and calculation-methodological principles of crater blasting in the less studied practice of blasting cofferdams and embankments, it is expedient to keep as one of the main calculation parameters the “index of action of the blast,” having transformed it to the ratio of the depth of the blasted cut and depth of the charge.