KUNLUNSHAN Tunnel, the longest plateau permafrost region tunnel of the world. The tunnel was built between 2001 and 2002. The overall length is 1686 meters and elevation 4648 meters. It was called the NO.1 main projects in Qinghai-Tibet Railway construction.
Wet shotcreting temporary support technology was applied in this project. And ONTON supplied rock bolts to it.
Meanwhile, the longest tunnel of Qinghai-Tibet Railway, YANGBAJING Tunnel, also used SDA of ONTON.