Project Introduction: The Jiaohe Pumped Storage Hydropower Station is located in Pipahe Village, Jiaohe City, Jilin. Our company is mainly responsible for the bolt drilling and installation works in the underground powerhouse, main transformer surge chamber, tailwater surge chamber, and other underground power generation system cavities. Our company has initially invested in a two-boom imported computer-controlled tunneling machine and will subsequently invest in a fully imported three-boom drilling and tunneling machine. The difficulty during the entire construction process lies in the support work of the three major cavities. The pumped storage hydropower station has small cavities, narrow working areas, numerous intersecting processes, and hard rock formations, resulting in significant construction challenges.