甘肃积石山强震诱发同震滑坡-泥流灾害链联动耦合致灾效应  

The coupling effect of coseismic landslide-mudflow disaster chain induced by Jishishan strong earthquake in Gansu Province

作　　者：宿星[1] 魏万鸿[1] 张满银[1] 董耀刚[1] 张连科[1] 周自强[1] 安亚鹏 何雄伟 文智远 张晓明 SU Xing;WEI Wanhong;ZHANG Manyin;DONG Yaogang;ZHANG Lianke;ZHOU Ziqiang;AN Yapeng;HE Xiongwei;WEN Zhiyuan;ZHANG Xiaoming(Institute of Geological Hazards Prevention,Gansu Academy of Sciences,Lanzhou 730000,China;School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China;College of Resources and Environment,Gansu Agricultural University,Lanzhou 730070,China)

机构地区：[1]甘肃省科学院地质自然灾害防治研究所,甘肃兰州730000 [2]兰州理工大学土木工程学院,甘肃兰州730050 [3]甘肃农业大学资源与环境学院,甘肃兰州730070

出　　处：《冰川冻土》2024年第3期763-779,共17页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金项目(42067066);甘肃省重点研发计划项目(23YFFA0030);甘肃省科学院应用研发项目(2021JK-08);甘肃省重点人才项目(2022RCXM094);第二次青藏高原综合科学考察研究项目(2019QZKK0902)资助。

摘　　要：近年来黄土区强震和极端天气诱发的典型滑坡-泥流灾害链事件呈多发态势,链式地质灾害较单一灾害隐蔽性更强、波及范围更大、破坏程度更高、损失更严重,因此链式地质灾害防控研究一直是防灾减灾的热点和难点。2023年12月18日23时59分,甘肃省临夏州积石山县发生Ms 6.2级地震,震源深度10 km,已造成151人死亡。此次强震诱发青海省民和县中川乡草滩村—金田村滑坡-泥流链式灾害,共造成20人死亡,灾害链致死率占地震遇难总人数的13.5%。灾后通过遥感影像处理解译、文献资料整理甄别、无人机摄影航测、野外详细勘查访问、现场采样分析测试等手段方法,对滑坡-泥流链式灾害开展了较全面系统研究,恢复和重现滑坡-泥流灾害链的启动-滑动-流动-堆积过程,探讨提出“滑源区地表冻结阻隔滞水效应、滑源区沟谷整平回填滞水效应、滑源区台地灌溉渗流饱水效应、滑源区振动液化筛选启动效应、滑源区漏斗收口增速启动效应、流通区土体差异流动分选效应、流通区沟岸坍塌补给增流效应、流通区沟底冰封饱水加速效应、堆积区上游渗水补给增程效应”等9大联动耦合致灾效应。该研究可为链式地质灾害的形成机理与防控提供科学参考。In recent years,typical landslide-mudflow disaster chain events induced by strong earthquakes and ex-treme weather in loess areas have become more frequent.Compared with single disasters,chain geological disas-ters have stronger concealment,wider spread,higher damage degree and more serious losses.Therefore,the re-search on the prevention and control of chain geological disasters has always been a hot and difficult point in di-saster prevention and reduction.At 23:59 on December 18,2023,an Ms 6.2 magnitude earthquake struck Jish-ishan County,Linxia Prefecture,Gansu province,at a depth of 10 km,killing 151 people.The strong earth-quake triggered a landslide-mudflow chain disaster in Caotan Village and Jintian Village,Zhongchuan Town,Minhe County,Qinghai Province,resulting in a total of 20 deaths,the disaster chain fatality rate accounted for 13.5%of the total number of earthquake fatalities.After the disaster,a comprehensive and systematic study on the landslide-mudflow disaster chain was carried out by means of remote sensing image processing and interpreta-tion,literature sorting and screening,UAV photographic aerial survey,detailed field survey and visit,and on-site sampling and analysis testing,so as to recover and reappear the start-slide-flow-accumulation process of the landslide-mudflow disaster chain.This paper discusses and puts forward nine major coupling and disaster-caus-ing effects such as surface freezing blocking water retention in the slip source area,gully leveling backfill water retention in the slip source area,platform irrigation seepage filling effect in the slip source area,vibration lique-faction screening effect in the slip source area,growth rate of the funnel closure in the slip source area,soil dif-ferential flow sorting effect in the flow area,collapse recharge effect in the flow area,acceleration effect of ice filling water at the bottom of the flow area,and upstream seepage recharge and range extension effect in the accu-mulation area.The Zhongchuan landslide-mudflow chain disaster ca

关 键 词：积石山地震 滑坡-泥流灾害链 联动耦合 黄河上游 青藏高原东北缘 

分 类 号：P694[天文地球—地质学] P315