The objective of the RFCS STAMS project is to implement these technologies in underwater conditions, to integrate them into multifunctional monitoring and inspection modules, and to design permanently installed sensors, to guarantee periodic and long-term continuous monitoring and condition assessment of flooded mine shafts.
Two categories of equipment were researched. The first allows detailed measurements to be made periodically and the second category allows less detailed measurements to be made continuously.
Two periodic monitoring modules – the Multifunctional Monitoring Module (MMM) and the Ultrasonic Inspection Module (UIM) – were developed, based on a large database of flooded shafts in Europe. They can investigate the state of the lining shafts under high pressure and turbulent water. A Reference Point Installation Module was developed using an ROV (Remotely Operated underwater Vehicle) to fit specially designed reference points. Software was developed to control these instruments and analyse the data and the measurements. The functionality of the developed tools was successfully verified first under laboratory conditions and then in-situ in real flooded shafts.
For continuous monitoring, detailed studies were conducted into electronic sensors that do not require an electrical connection to the line. A tube bundle system was designed and prototyped for very long-term operation in hostile environments.
In addition, laboratory tests were carried out to investigate the production of gas as an indicator of the degradation of the lining of the flooded shafts.
Finally, advanced coupled numerical models were realized to study the effect of degradation on the local and global instability of flooded shafts.
Dissemination of the results was done through scientific and technical papers and via a specific workshop organised for mining companies in Poland.