SPEAKER – Brian Klappstein
TOPIC – Real-time Slope Monitoring in Structurally Complex Coal Deposits
This presentation summarizes the implementation of real time slope monitoring systems at a coal mine operating in the rugged topography of the Alberta foothills, excavating structurally complex coal deposits within thrust and fold belt geology. In the last decade, the geotechnical monitoring at this site progressed from manual (daily to monthly) monitoring of a network of survey prisms and piezometer installations, to real time (hourly or less) monitoring of slopes by multiple robotic total stations sampling prism networks on pit walls and dumps, and slope scanning radar.
During this period, the mine experienced a number of slope failures on both pit walls and waste rock dumps. Back-analysis of these failures from the prism network and slope stability radar monitoring data has refined the understanding of the speed failures progress at. The metrics and thresholds which define how alarm systems should respond to deformation for each of these two primary impending slope failure detection technologies is discussed.