Oyu Tolgoi, Mongolia.

In 2019, thyssenkrupp selected Alspaugh as the “Subject Matter Expert” to simulate starting and stopping and help properly size drive, backstop and braking solutions for the Oyu Tolgoi slope conveyors. in Mongolia.

The C2S decline is a parallel tunnelling system consisting of three main units: conveyors 20,21 and 22. Each decline leg is approximately 2,200 m long and 395 m deep, and consists of approximately 16.6 km of tunnels in total with 18% decline angle. Plus it includes two mass excavations of 35,000 m3, the equivalent of a 7 to 8 storey building. thyssenkrupp supplied the overall conveyor system with Siemens undertaking the engineering, design, production and supply of the electrical equipment including both gearless and conventional drives. In all, the transport system consists of a total of nine conveyors – seven underground and two at surface. Four of these conveyor belts have a gearless design, each with two 5.5 MW drive systems.