Las Minas Breakthrough

The Double Shield Universal TBM operating in the Minas project in Ecuador successfully broke through on April 24th 2017. The machine is now completing the slide-out procedure to extract the back-up from the excavated tunnel.

Seli Technologies designed the machine and provided after-buy technical assistance for the entire excavation.




The machine used in this project has the following main characteristics:

  • 5.67 diameter cutterhead with 37 19″ cutters
  • 2205 kW main drive with 2900 kNm working torque
  • Main thrust system 22643 kN
  • Auxiliary thrust system 13511 kN
  • Modular backup system 1.5 rings capable