The U.S. raise boring operator Frontier Kemper ordered a RBR600VF Rig from Herrenknecht, which proved itself in the 6.7 meter diameter access shaft for the Warrior Coal mine in Kentucky, USA. A Raise Boring Rig with its highly efficient variable frequency drive supplied the torque and thrust required for this challenging project. Customer support for the Rig is provided by Herrenknecht Tunnelling Systems USA in Sumner, WA.

A world premiere is the system for remote maintenance of the Rig with the “Digital Drilling Report”, used here for the first time. Over a network connection it offers Frontier-Kemper the possibility to monitoring the drilling performance of the Rig, its availability and any difficulties encountered during operation in real time, from the jobsite office or from company headquarters. The system replaces the usual manual drilling report, simplifies evaluation and allows more reliable drilling data analyses that can be used for the optimization of future projects. The supplied integrated cooling unit ensures the operational readiness of the Rig at outside temperatures up to 40° C.