On May 19, 2022, the ultra-small turning radius hard rock roadheader Nanning No. 1 jointly developed by CREG, China Southern Power Grid Peak Shaving and Frequency Regulation Power Generation Company, and the 14th Bureau of Hydropower was successfully rolled off the assembly line in Kunming, and will be used for the first pumped storage in Guangxi. Power Station - Construction of artesian drainage tunnel for Nanning Pumped Storage Power Station.

The ultra-small turning radius hard rock roadheader Nanning No. 1 tailored by CREG has an excavation diameter of 3.53 meters and a minimum turning radius of 30 meters. The characteristics of continuous construction and continuous construction provide a strong guarantee for the safe, high-quality and efficient construction of the project.

The excavation of the artesian drainage tunnel of Nanning Pumped Storage Power Station faces three main challenges: small hole diameter, long distance, and single-headed excavation. It not only has to deal with complex strata such as large burial depth and extremely hard rock, but also needs to penetrate the Shajiang branch ditch with shallow burial depth. , strong weathering, large water seepage and many other risk sources, the construction is difficult and the safety risk is high.

Nanning Pumped-storage Power Station is the first pumped-storage power station in Guangxi, with a total installed capacity of 1.2 million kilowatts, a total investment of about 8 billion yuan, and an annual designed power generation of 1.6 billion kilowatt-hours. It is expected to be completed and put into operation in 2025. The coordinated operation of new energy in Guangxi region provides a strong guarantee for promoting the large-scale development and utilization of clean energy in Guangxi.Editor/Ma Xue