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Maptek Sentry brings the safety of remote sensing and the reliability of laser scanning technology to underground monitoring.
Displacements underground are traditionally measured by point measurement devices, such as extensometers. However, only one dimension is measured and behaviour is monitored in only a small area. Manual measurement is also impractical and unsafe, with potential to interrupt mining operations.
Remote sensing with Maptek Sentry is a practical, cost-effective and safe method for monitoring movement of rock masses and support structures in underground mines.
Sentry combines data from Maptek I-Site 8820 and 8200 series laser scanners with sophisticated software to track and analyse movement over time. Intensity-based grayscale images allow the system to operate in low light environments such as underground and at night.
Sentry helps improve safety underground by early detection of movement.
Movement in entire mine sections can be visualised and reviewed through high detail time-lapse videos.
Sentry laser-based scanning is the most effective method for monitoring roof movement. This can be done regularly without relying on lengthy stoppages of the face.
Remote sensing is fast, cost-effective and practical to implement. Manual measuring devices are subject to changing behaviour underground and are difficult to use in the dark, dusty, humid environment.
Regular monitoring is critical for balancing continuous production against the risk of major delays. Problems can be identified early to allow remedial action before a minor issue escalates into a major failure.
Underground operations can apply I-Site spatial imaging solutions to all development survey, stope scanning and conformance reporting tasks. Survey applications include face end location and face alignment, drive clearance and adherence to design, scaling and spalling on ribs.
If a monitoring task is interrupted, or the I-Site laser scanner is taken away to be used for other survey tasks, Sentry can be resumed without losing the monitoring history.
Sentry data provides slope stability and geotechnical engineers with enhanced awareness of rock mass behaviour. Sentry can track movement leading to rockfalls and provide quantitative information on rockfall volumes.
Analysis tools in Sentry allow for historical comparison of point readings. Results can be displayed on a velocity graph or a distance map. Volumes of materials moved as a result of failures can be quantified.
Accuracy, ease of use and low power consumption make Sentry an attractive alternative to all other underground monitoring systems.