In 2004, Xinwen Mining Group, one of the ten largest coal mining enterprises in China, awarded a significant contract to ABB for two production hoists for Longgu Coal Mine, the first of seven coal mines to be developed in Juye mining area, Shandong Province.
Coal as a major energy resource in China
Since China has a lack of oil and natural gas, coal continues to be a major source of the country’s energy. Coal provides energy for 74 percent of China’s total primary energy consumption and thus plays a critical role in the country’s economic development. Longgu Coal Mine, with annual capacity around six million tons, has therefore been listed as a National Key Construction Project by the Chinese Government.
Main supply from ABB
ABB has delivered two identical mine hoists for production, including both mechanical and electrical parts with the following data:
Payload 32 tons
Hoist speed 12.5 m/s
Hoist distance 835 m
Production capacity 970 tons/hour
Main mechanical equipment
- Pulley Ø 4.5 m
- Shaft
- Bearings & bearing houses
- Deflection sheaves Ø 4.5 m
- Hydraulic brake system
Main electrical equipment
- Synchronous motor 4,800 kW
- Drive ACS 6000 DTC
- Control system
- Signaling