藏东南某水电站枢纽区危岩体运动特征分析

Analysis on the movement characteristics of dangerous rocks in the hub area of a hydropower station in Southeast Tibet

以正在开发的藏东南某水电站为例,采用野外地质调绘和无人机摄影测量对枢纽区高陡边坡危岩体进行识别,通过三维落石模拟软件RocPro3D分析潜在危岩体运动特征。研究表明:两岸发育危岩体共计533个,其中危石、危石群、危岩体在两岸尤为发育,孤石、孤石群次之;危岩体运动特征分析表明,枢纽区危岩体破坏后,均沿着坡面滚入沟道向下运动至沟谷或入江。研究成果可直接为该水电站枢纽区危岩体防治设计提供依据,同时可加深对藏东南地区复杂地质环境条件下危岩体发育特点的认识。

Taking a hydropower station in southeastern Tibet that is currently under development as an example,this paper used field geological mapping and drone photogrammetry to identify the dangerous rock masses on high and steep slopes in the hub area,using the 3D rockfall simulation software RocPro3D analyzed the potential movement characteristics of dangerous rock masses.The research shows that there are a total of 533 rock masses developed on both sides,with dangerous rocks,dangerous rock groups,and dangerous rock masses particularly developed on both sides,followed by solitary rocks and solitary rock groups;the analysis of the movement characteristics of dangerous rocks indicates that after the destruction of dangerous rock masses in the hub area,they all roll down the slope into the ditch and move downwards to the valley or into the river.The research results can directly provide a basis for the prevention and control design of dangerous rock masses in the hub area of the hydropower station,and at the same time deepen the understanding of the development characteristics of dangerous rock masses under complex geological environment conditions in southeastern Tibet.