Health and Safety CONFERENCE

Play Video


Click the large image above to stream this video directly from Vimeo at the best resolution for your device.

If you need to save a copy of the video to your computer, you can click the blue DOWNLOAD VIDEO button and a copy of the video file will be downloaded to your hard drive. The file is an mp4 file in 720p HD format (suitable for projection to a large screen) and will take some time to download. Please be patient.

If you experience any problem with either option please use the CONTACT FORM to get in touch with EverTechnology for personal assistance.

Use of Laser Scanners in an Underground Coal Mine for Strata Monitoring, Drift Convergence & Incident Investigations

Ravindu Goonawardene
Geology and Geotechnical Superintendent, Anglo American – Grosvenor Mine

Chris Crosby
Surveying Superintendent, Anglo American – Grosvenor Mine

The risk of fatalities due to roof and rib failures is still prevalent in underground coal mines which highlights the fundamental importance of monitoring roof and ribs in underground roadways. Monitoring strata deformation and convergence in underground roadways is a key metric for measuring instability of excavations. Visual inspections, telltales, extensometers and instrumented bolts are some of the methods used to quantify strata deformation.

The significant limitations of the current methods only provide a point-measurement along the roadway. Using laser technology allows the mine to scan and measure large regions of roof and ribs across continuous regions with millimetre accuracy.

The Maptek SR3 laser scanner has been used as a control during the rib optimisation trial at Grosvenor. This technology provides a baseline scan and subsequent scans to ascertain the extent of deformation throughout the active development mining areas. Thus, allowing geotechnical engineers to assess the adequacy of the trialled support system. Moreover, this technology allows geotechnical engineers to better analyse geological anomalies (fault orientations, dips, throw), bolting tolerances and excavation dimensions in an effective manner.