长江科学院院报2019，Vol.36Issue(2)：46-51,57,7.DOI:10.11988/ckyyb.20171017
金沙江上游某特大型滑坡发育特征及堵江机制
Development Characteristics and River-blocking Mechanism of a Mega-landslide in the Upper Reach of Jinsha River
摘要
Abstract
The secondary geological disasters induced by densely-developed landslides in the upstream of Jinsha River have severely threatened people’s livelihood and property security and the construction of reservoirs in the drainage basin. At present, however, river-blocking landslides in the Jinsha River basin, in particular, the mecha-nism of river blocking is rarely reported. In this paper, the development characteristics and river-blocking mecha-nism of a mega-landslide in the upstream of Jinsha River are investigated via drilling exploration and numerical sim-ulation based on in-situ geological survey. Study results show that the bedrock landslide was developed on conse-quent and steep slope dominated by mica-quartz schist. With a total volume of 60 million m3, the landslide had blocked the Jinsha River severely, displaying an evident chair shape. The river-blocking mechanism is summarized as follows: high-speed sliding of bedding slope → collision and accumulation of front edge → pushing by the trai-ling edge → consolidation until damming → complete blocking of the river.关键词
特大型滑坡/滑坡发育/堵江特征/堵江机制/金沙江上游Key words
mega-landslide/landslide development/river-blocking characteristics/river-blocking mechanism/up-per reach of Jinsha River分类
天文与地球科学引用本文复制引用
王家柱,任光明,葛华..金沙江上游某特大型滑坡发育特征及堵江机制[J].长江科学院院报,2019,36(2):46-51,57,7.基金项目
中国地质调查局项目(121201010000150003) （121201010000150003）
