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5.12汶川大地震震后,对四川省巴州区次生地质灾害应急调查表明,地质构造和地形地貌是巴州区地质灾害形成的主导因素,降雨是地质灾害的主要诱发因素。巴州区主要的地质灾害类型为崩塌和滑坡,其中崩塌的危害性较大。现场调查表明,巴州区崩塌地质灾害类型以岩质崩塌为主,滑坡地质灾害类型以残积层滑坡为主,主要分布在构造侵蚀中低山和侵蚀剥蚀桌状低山地貌区。5.12汶川地震对潜在的崩塌危岩体的稳定性有不良的影响。
After the 5.12 Wenchuan earthquake, an emergency survey of secondary geological disasters in Bazhou district of Sichuan Province shows that geological structure and topography are the dominant factors in the formation of geological disasters in Bazhou District. Rainfall is the main inducing factor of geological disasters. The main types of geological disasters in Bazhou are collapsing and landslide, of which the collapse is more harmful. The field investigation shows that the type of geological disasters in Bazhou is dominated by rock mass collapse, and the type of landslide geological disasters is mainly composed of residual layer landslides, which are mainly distributed in mid-low tectonic erosion and eroded table-shaped low mountainous area. The 5.12 Wenchuan earthquake adversely affected the stability of potential collapsible rock mass.