Five key technologies of the company's construction method have passed the ministerial appraisal

Recently, five key technologies of the company's construction method have passed the appraisal of China's non-ferrous metal construction industry expert group successfully. Through the expert group appraisal, 3 technologies are identified as the leading level in China, and 2 technologies are identified as the advanced level in China. The key technologies of the construction method passing the appraisal are: the mechanized construction technology of the super large mine chamber, the parallel operation technology of the blind shaft elevator chamber and the shaft, the mechanized processing technology of the expanded tube metal anchor bolt, the sectional blasting technology of the middle and deep holes in the patio and the advanced support construction technology of the tunnel with soft and broken surrounding rock, which will be applied for the next step by the company at the provincial and ministerial level and the national level Law laid the foundation.