Geotechnical Monitoring
Participants
The end users TITANIA, LA PARRILLA and MARINI MARMI have actively collaborated with SUBTERRA to deploy a monitoring system for acquiring initial state information from different mining sites.
Objective and Outcomes
The main objective of the task is to deploy a monitoring system to acquire initial state information of different mining sites and to acquire real time information for Geotechnical-Digital Twins development. Information such as orientation, spacing, trace length, and shear strength with respect to major structures and other geologic features to determine failure potential were collected and analysed.
This task is crucial to WP2 “Data acquisition”, as the most relevant geotechnical information were gathered within the work developed, as no other task is related to the obtaining of geotechnical data to develop further geotechnical digital twins. In addition, the outcomes of this task are useful for T4.2 “Geo-spatial attributes digital twins design and development”. The work to be done in task T4.4 ” Reduced Order Models Layers for digital twins” related to Reduced Order Models development is important to develop real time models.
Description
This task is focused on the data gathering using different sensors, such as UAV flights Laser Scanner, piezometers and earth pressure cells. The sensors installed in the mines gave information on surface movements, depth displacements, pore pressure, water level and a high-resolution 3D photogrammetric model that allows visual analysis. LA PARRILLA tailing dam has 4 boreholes with a piezometer and a pressure cell in each, we have also made a UAV flight. TITANIA A.S. has 12 boreholes with piezometers and inclinometers in each, we also have survey information of each borehole. Next to the Stabben area there is a borehole which provides us information of the slope. There also exist a Radar and historical UAV flights. MARINI MARMI, with no historical information, but an indoor and outdoor drone flight has been conducted.
Challenges
Connectivity
As is well known, mines usually are remotely located, so there are problems with connectivity, as other partners have experience. As modern mine sites require high throughput broadband connectivity to support increasingly digitalised operations and smart technologies, such as the Dig_IT platform. Digital transformation is driving the need for high-speed and reliable broadband connectivity to support, in this case, real time data analytics, so the availability of enhanced connectivity is critical. As the UAV flight needs good connectivity to send information, as the photos he takes are very heavy. We have sorted out this problem via Wi-Fi connection, the flight will be directed from the hut with Wi-Fi connection, and it will make the pre-designed flight, sending to the monitor with the SD card via Wi-Fi all the information. From the SD card to the platform, the data will be sent manually to the FTP, which is prepared to receive the data. Data Loggers connectivity was solved by adding them a 5G/4G SIM that was able to enable connection with internet and be able to send the information.
Real-time data processing
To reach as much accuracy as possible is necessary, as much information closed to real time, in short, as much information that is received with not much temporal difference than the measure is needed. To achieve this, a FTP server is used, receiving csv files with pore pressure and earth pressure data.
