喜马拉雅山地区重大地质灾害遥感调查研究  

PHYSICAL EXPERIMENT ON COLLISION FRAGMENTATION MECHANISM OF HIGH-SPEED ROCKSLIDE

作　　者：童立强[1] 祁生文[1] 安国英[1] 刘春玲[1] 

机构地区：[1]科学出版社

出　　处：《工程地质学报》2017年第5期1298-1298,共1页Journal of Engineering Geology

摘　　要：科学出版社内容介绍本书介绍了西起阿里地区札达县、葛尔县,东侧以雅鲁藏布江为界,北界为雅鲁藏布江大断裂,南至国界的广大喜马拉雅山地区的重大地质灾害遥感调查成果。从遥感信息源、图像处理、地质灾害分类、地质灾害遥感解译等方面详细介绍了地质灾害遥感调查技术路线;从气候环境特征、地形地貌环境特征、植被类型及盖度、The evolution of collision-fragmentation-disintegration has a significant control effect on the motional characteristics of large-scale high-speed rockslides, and affects the geological structure characteristics and the stability of accumulation body. This paper takes Tangjiashan high-speed rockslide as research object. It relies on the geological analysis principle. It interprets the fragmentation process and characteristics of collided sliding body. It further carries out the falling-collision experiments of cylindrical rock blocks drilled from the deposits. The weight loss induced by collision is quantified and the grading size of fragments is analyzed. In term of observation, it is shown that the higher the impacting velocities, the more mass loss, the finer the fragments tend to be, of which the friction coefficient is usually lower than the initial intact rocks. Moreover, the conventional mechanics experiment ofimpacted rock before and after collision is carried out to obtain the correlation between the impacting velocity and the mechanical parameters of rock blocks. The result shows that collision could greatly reduce the mechanical indexes of rock masses. Considering the macroscopic condition, the physical collision model experiment along a designed channel is implemented to acquire the relationship between the velocity and pattern of collision and the runout of landslide, as well as the accumulation form. The conclusion could provide some reference for the scope prediction of high-speed rockslide.

关 键 词：重大地质灾害 遥感调查 喜马拉雅山地 土地利用特征 内容介绍 图像处理 植被类型 遥感解译 地貌环境 冰湖溃决 

分 类 号：P588.1[天文地球—岩石学]