防灾减灾工程学报2025，Vol.45Issue(2)：349-356,8.DOI:10.13409/j.cnki.jdpme.20240131003
甘肃积石山6.2级地震诱发中川乡流滑成因初探
A Preliminary Study on Causes of Flowslide in Zhongchuan Township Triggered by M6.2 Jishishan Earthquake in Gansu Province
摘要
Abstract
On December 18,2023,a 6.2 magnitude earthquake in Jishishan County,Linxia Prefec-ture,Gansu Province triggered a special flowslide,which differed significantly from conventional land-slides.Currently,the causes and mechanisms of such disasters are unclear,and their early identifica-tion remains challenging.This study conducted detailed field investigation and analysis of the Zhongch-uan Township flowslide,which could provide important theoretical and practical implications for pre-venting such disasters.The geological disaster triggered by the Jishishan earthquake was a low-angle loess slope flowslide,with a long sliding distance and viscous mud outbursts in the accumulation area,submerging multiple houses and leaving 20 people missing.Through in-depth field investigation and analyses,the causes,movement patterns,and surge velocities of the flowslide were explored.The re-sults showed that:(1)the flowslide occurred on the second and third terraces of the Yellow River,with an elevation difference of 79.2 m,a sliding distance of approximately 3.1 km,and an overall slope angle of merely 1.5°.This event was identified as a low-angle loess slope flowslide triggered by a strong earthquake.(2)The primary causes of the flowslide included high saturation of source loess in-duced by continuous irrigation,structural collapse of under-consolidated saturated loess triggered by a strong earthquake,flow failure of low-plasticity-index loess,and enhanced damage due to embank-ment failure and gully constriction.关键词
积石山地震/中川乡流滑/流滑特征/流滑成因Key words
Jishishan earthquake/Zhongchuan Township flowslide/flowslide characteristics/flowslide causes分类
地球科学引用本文复制引用
常晁瑜,乔峰,薄景山,绽蓓蕾,谷佳沛,李昊宇,田华俊..甘肃积石山6.2级地震诱发中川乡流滑成因初探[J].防灾减灾工程学报,2025,45(2):349-356,8.基金项目
河北省自然科学基金项目(D2023512028)、中国地震局地震科技星火计划项目(XH24061YA)、国家自然科学基金项目(U1939209)资助 （D2023512028）
