Duobaoshan Copper Mine Project

Special TBM design suits 18.1% downhill tunneling.

The TBM CREC 1136 is applied to the construction of the belt conveyor transportation roadway, which features large gradient (18.1% downhill) and an ultra-small curve radius (50 m). The tailor-made coal mine TBM is specially designed to solve the problems of material transportation on large slopes, tunnelling attitude control, as well as reverse slope drainage and water stoppage. Since launched in October 2022, the TBM has completed tunnelling in large gradient and small curve radius and achieved a best monthly advance rate of 503 m.

Project Background

The Duobaoshan mine boasts rich deposit of copper, molybdenum and associated precious metal resources. However, the exploitation of the mineral resources is rather difficult because the ore bodies are deeply buried underground and the alignment changes greatly. Besides,the project has a complex geological condition, high safety risks and harsh weather and thus is faced with great construction difficulties.

Construction of the roadway faces challenges of large slope and small curve radius.

The TBM achieved tunnel breakthrough, boring over 500 m in a month.