The surveying of an underground mine is difficult for two orders of problems: the complicated and dark tunnels environment and the underground depth where GPS or GNSS signal can't be reached. The Aurantech company has faced this problem in an old underground mine site, in Zhejiang and thanks to the HERON wearable mobile mapping system the procedure for data collection was not only possible but also efficient.Read more
After pre-processed the surveying acquisitions and filtered the noise, it has been possible to build the surface model of the tunnel, based on the required parameters, with a global accuracy of 10 cm.
The data extraction has been made with JRC 3D Reconstructor software. First of all, the data have been aligned via the automatic registration and bundle adjustment software's functions. Then, the cross-sections have been easily generated and volume and surface areas computed on the 3D model. Finally, the 3D model was easily exported to third-party applications using one of the most common data interchange formats.
Fig 1. The operator with HERON AC-1 during the surveying activities in the underground mine
Fig 2. HERON point cloud model of the underground mine with the path
What we had to do was just to set up some control points using a total station and then simply walk with HERON. Software and hardware made the work easier and supplied us with a complete solution. HERON is a reliable, simple and high-performance 3D solution
AURANTECH | Commercial Manager
Fig 3. CAD environment: cross sections of the HERON point cloud model