The site of Bulunkou-Konggur hydropower station is located in an area with high terrestrial stress and high altitude.As one of the biggest steeply inclined shaft among the shafts which have been built and are being built,its inclined diversion shaft has many insecurity factors and construction difficulties.The construction scheme of first excavating the construction pilot shaft,then excavating from top to bottom was used in this project.The excavation method of construction pilot shaft with full face drilli...