Monitoring of rock mass movement using a distributed array of wi-fi enabled extensometers

Authors: MacGregor, S; Seaward, P; Farrington, M Download Paper Open access courtesy of:

DOI https://doi.org/10.36487/ACG_repo/2325_03

Cite As:
MacGregor, S, Seaward, P & Farrington, M 2023, 'Monitoring of rock mass movement using a distributed array of wi-fi enabled extensometers', in J Wesseloo (ed.), Ground Support 2023: Proceedings of the 10th International Conference on Ground Support in Mining, Australian Centre for Geomechanics, Perth, pp. 61-74, https://doi.org/10.36487/ACG_repo/2325_03



Abstract:
Measurement of ground movement into the rock mass around underground openings enables quantification of the timing, failure mode and depth of rock failure. Geotechnical instrumentation, such as extensometers, help to evaluate the performance of the ground support system, which leads to improved ground support design. The use of extensometers that monitor rock mass movement into and around the excavation are seen as complementary technology to LiDAR and other convergence monitoring. This paper outlines the development of an Internet of Things platform that comprises a four-anchor wire extensometer with integrated data logging that is wi-fi enabled. The system is supported by an analytical software suite. A case history provided from Fosterville Gold Mine outlines the deployment of RockSHIELD® in a wi-fi denied environment (tablet-based) as well as a fully networked, surface-controlled distributed array of sensors operating on a web-based platform. Integration with tablet- and web-based software enables operational personnel to readily access the data and manage ground fall risk on a shift-by-shift basis. Discussion is provided on the integration and synergies with LiDAR and other ground convergence monitoring approaches to fully utilise the value of current ground monitoring systems.

Keywords: extensometer, wi-fi, ground support, rock mass monitoring, Fosterville Gold Mine

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