强震区断裂活动与大型滑坡关系研究

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Abstract The relationship between active fault zone and large-scale landslides is a major issue on which people always concern. Based on field investigation of active fault zones and large-scale landslides induced by Wenchuan Ms 8.0 earthquake，the geological setting for large-scale landslides initiation in the Longmenshan active fault zones is documented，and the characteristics of distribution，shape，initiation and segmentation，as well as their influential factors，are summarized. Taking the Xiejiadianzi landslide-debris flow near the central Longmenshan fault zone as an example，simulations of the processes of landslide starting and fast slipping have been carried out by the discrete element method(DEM). It is thought that the disaster result of a rapid and long run-out landslide are dominated by the starting style，debris flying route and dumpling features. This research provides important information for the realization of the relationship between the fault movement and the formation of large-scale landslides，as well as prediction of the disaster result caused by earthquake landslides.

Key words： earthquake engineering Wenchuan earthquake earthquake induced landslide active fault numerical simulation discrete element method(DEM)

Received: 24 August 2010

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http://www.rockmech.org/EN/Y2011/V30/IS2/3503

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