Geomechanical modelling as central component of a landslide alert system prototype : case study 'Opencast Mine'
Eichhorn, Andreas
separation of different kinematic / geomechanical conditions of the slope. In the EU funded project OASYS five decision levels were defined to evaluate the current stability status, and to take adequate measures for instrumentation, monitoring and alerting Normal operation ⇒ Low Margin Operation ⇒ Warning ⇒ Emergency ⇒ Post Mortem To provide suitable indicators for allocation of the different levels is one major goal of the analysis of the landslide process and the task of an alert system. Structural models of landslides, realized with Finite Element software packages like FLAC-2D/3D or Distinct Element methods like PFC2D/3D (from HCITASKA COMPANY) offer very comprehensive possibilities for the analysis and prediction of critical states of the slope. Representing its inner structure, numerical stress distribution indicators (i.e. a factor of safety) can be calculated. In this paper the creation and combination of a geomechanical FE-model with a geodetic and geotechnical monitoring system of a test-slope is presented. The slope is located within an opencast mine in Northern Germany and is primarily influenced by mass excavation with bucket-wheel excavators.
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