Construction Technology of Exploration Shaft and Test Adit of Hydropower Station in Sichuan

Abstract:

The sand-and-cobble layer of river bed is thick in the exploration shaft of Angu hydropower station of Sichuan, the construction was difficult to use traditional wall protection by manual digging. According to the formation characteristics, boring was constructed with percussion drill. And test adit was dug in the shaft, following the construction of scheme of more blast hole, small scale of drilling footage, small charge and smooth blasting.