[1]陈宁生,吴铭洋,李安辉,等.云南镇雄“1·22”山体滑坡灾害调查[J].山地学报,2024,(3):422-430.[doi:10-16089/j.cnki.1008-2786.000834]
　CHEN Ningsheng,WU Mingyang,LI Anhui,et al.Field Survey of the Zhenxiong Landslide on January22, 2024 in Yunnan Province, China[J].Mountain Research,2024,(3):422-430.[doi:10-16089/j.cnki.1008-2786.000834]
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云南镇雄“1·22”山体滑坡灾害调查
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2024年第3期
页码:
422-430
栏目:
研究简报
出版日期:
2024-05-25

文章信息/Info

Title:
Field Survey of the Zhenxiong Landslide on January22, 2024 in Yunnan Province, China
文章编号:
1008-2786-(2024)3-422-9
作者:
陈宁生1; 2; 3;  吴铭洋2; 4;  李安辉2; 5;  田树峰2; 3;  佘德彬2
(1. 长江大学 地球科学学院,武汉 430100; 2. 中国科学院、水利部成都山地灾害与环境研究所,成都 610299; 3. 青海省人民政府—北京师范大学高原科学与可持续发展研究院,西宁 810016; 4. 昆明理工大学 公共安全与应急管理学院,昆明 650093; 5. 西藏大学 工学院,拉萨 850013)
Author(s):
CHEN Ningsheng1; 2; 3;  WU Mingyang2; 4;  LI Anhui2; 5;  TIAN Shufeng2; 3;  SHE Debin2
(1. School of Geosciences, Yangtze University, Wuhan 430100, China; 2. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610299, China3. lnstitute of Plateau Science and Sustainable Development Research, Qinghai Provincial People’s Government-Beijing Normal University, Xining, 810016, China; 4. College of Public Safety and Emergency Management, Kunming University of Science and Technology, Kunming 650093, China; 5. College of Engineering, Tibet University, Lhasa 850013, China)
关键词:
镇雄“1·22”山体滑坡;  后端汇水;  低温;  冻胀
Keywords:
the Zhenxiong “1 ·22” Landslide;  ponding/infiltrating at slope shoulder;  low-temperature;  frost heaving
分类号:
P642.22
DOI:
10-16089/j.cnki.1008-2786.000834
文献标志码:
A
摘要:
2024年1月22日5时51分,云南省镇雄县凉水村发生滑坡灾害,导致凉水村合兴、和平两个村民小组共44人死亡。基于现场调查、无人机航测和遥感解译分析确定该地质灾害属中小规模滑坡,并探讨了其成因机理。结果表明:(1)镇雄滑坡是一次典型的“小滑大灾”灾害事件,其规模约11.88万m3,导致44人死亡;(2)滑坡发生前的坡体为一个裂缝发育的临界稳定态斜坡,岩石节理裂隙达1.4条/m,滑坡堆积石块中陈旧的历史风化断面占比超60%;(3)低温冻胀作用极可能最终触发了滑坡的发生,坡体的后端汇水、砂泥岩互层的地层和滑坡发生前的低温三个因素奠定了坡体冻胀失稳的基础。此类冬季发生的地质灾害具有极强的意外性,需引起高度重视。本研究可为高原和高纬度地区由低温冻胀作用触发的滑坡防控提供案例和借鉴。
Abstract:
At 5:51 a.m. on January 22, 2024, a catastrophic landslide struck Liangshui village, Tangfang town, Zhenxiong county, Zhaotong city, Yunnan province, China, resulting in 44 casualties at two Sub-Village at Hexing and Heping. A emergency team was organized to examine the genesis of the landslide using on-site investigation, UAVs aerial photography and remote sensing interpretation.
(1)The Zhenxiong landslide was categorized as a small-scale geo-catastrophe, with sliding mass volume about 118 800 m3, but badly led to 44 deaths.
(2)Prior to the occurrence, the original slope body developed a density of joint fractures up to 1.4/m, and weathering cross-sections were found in up to 60% of stacked rocky screes, suggesting before the slope failure there had been a critical stable state.
(3)It is quite evident that the action of low-temperature frost heaving on unstable slope ultimately triggered the landslide. Three factors, the ponding/infiltrating at the rear edge of the slope shoulder, the interbedding stratum of stone-mudstone and the persistent low-temperatures ahead of the sliding laid the foundation for the catastrophe.
The occurrence of such a small-scale landslide but severe consequence occurring in winter is highly unexpected, and it needs to be given high scientific concern.

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备注/Memo

备注/Memo:
收稿日期(Received date): 2024- 04- 01; 改回日期(Accepted date):2024- 06-20
基金项目(Foundation item): 国家自然科学基金(42361144880); 国家重点研发项目(2023YFC3008301)。[National Natural Science Foundation of China(42361144880); National Key Research and Development Program of China(2023YFC3008301)]
作者简介(Biography): 陈宁生(1965-),男,博士,教授,主要研究方向:山地灾害形成机理与防治。[CHEN Ningsheng(1965-), male, professor, research on mountain disaster formation mechanism and prevention] E-mail: chennsh@imde.ac.cn
更新日期/Last Update: 2024-05-30