A METHOD TO ASSESS COLLISION HAZARD OF FALLING ROCK DUE TO SLOPE COLLAPSE APPLICATION OF DEM ON MODELING OF EARTHQUAKE TRIGGERERED SLOPE FAILUARE FOR NUCLEAR POWER PLANTS.

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  • 個別要素法による原子力発電所周辺の地震起因性斜面崩落挙動のモデル化と適用性

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Risk evaluation of slope failure against nuclear power plants, which is induced by unexpectedly large earthquakes, has been urgent need for disaster prevention measures. Specially, for risk evaluation of slope failure, understanding of information such as traveling distances, collision velocities, and collision energies is very important. Discrete Element Method (DEM) such as particle simulation method contributes important role on predicting the detailed behavior of slope failure physics. In this study, instead of accurately predicting the complicated behavior of sliding and falling for each rock, we introduce the DEM modeling to evaluate the average traveling distance of collapsed rocks and its statistical variability. First, we conduct the validation test of the proposed DEM model on the basis of reconstruction of experiment results. Next, we conducted the parametric studies to examine sensitivities of important parameters. Finally, validity of the proposed method is evaluated and its applicability and technical assignments are also discussed.

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