Research on setting early warning thresholds of slope monitoring based on slope radar and GNSS monitoring systems
XU Guang
MA Pengfei
Abstract：To establish reasonable early warning thresholds for open-pit mine slopes monitoring suitable for different monitoring devices,this article analyzes the variation patterns of landslide displacement time(s-t)curves based on the technical principles of slope radar and Global Navigation Satellite System(GNSS),combines an improved tangent angle analysis,ultimately determines a four-tier slope early warning threshold applicable to both slope radar and GNSS monitoring systems.The results indicate that GNSS-monitored s-t curves completely reflect the acceleration change process,including the initial deformation phase,intermediate acceleration phase,and rapid acceleration phase,while radar-monitored s-t curves typically only include the initial and intermediate phases.When setting early warning thresholds for slope radar,we divide the intermediate phase into two sub-stages to meet the four-tier warning requirements.Differences exist between GNSS and slope radar early warning thresholds,with a GNSS threshold set at 1.5 times that of slope radar being more reasonable.Introducing minimum displacement as an auxiliary warning criterion avoids false alarms caused by relying solely on rate indicators.
Keywords：slope radarGNSSslope monitoringearly warning thresholdtangent angleslope stabilitylandslide
Publication Date：2026-02-28
Online Publishing Date：2026-03-19(First online date of this platform, not the publication date of the document)
Pages：6( 38-43 )