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Mechanism and movement process of the '2.8' rock avalanche in Junlian County, Southwest China.

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Title: Mechanism and movement process of the '2.8' rock avalanche in Junlian County, Southwest China.
Authors: Bai, Yongjian1,2,3 (AUTHOR), Yin, Yueping4 (AUTHOR) 157123523@qq.com, Hongjie, Dou2 (AUTHOR), Gong, Linfeng1 (AUTHOR), Xiong, Xiaohui1 (AUTHOR), Wei, Xu1 (AUTHOR), Gao, Yanchao1 (AUTHOR), Tie, Yongbo1 (AUTHOR), Li, Qi1 (AUTHOR), Zhu, Sainan4 (AUTHOR), Huang, Xue5 (AUTHOR)
Source: Landslides. May2026, Vol. 23 Issue 5, p1275-1289. 15p.
Subject Terms: *Rockslides, *Landslides, *Landslide hazard analysis, *Geological research, *Rainfall, *Earthquakes
Geographic Terms: Southwest China
Abstract: The Wumeng Mountain Area is located in the transitional zone between the Sichuan Basin and the Yungui Plateau and between the Yunnan–Guizhou Plateau and the Qianzhong Mountainous Region. Widely distributed geological structural masses, characterized by gently inclined, interbedded sandstones, mudstones, and shales, are highly susceptible to geohazards. Rock avalanches triggered by the coupled effects of rainfall, earthquakes, and anthropogenic activities frequently occur. On February 8, 2025, a rock avalanche occurred in Jinping village, Junlian County, resulting in the tragic loss of 29 lives. To elucidate the disaster mechanisms and movement processes, field investigations, LiDAR mapping, and geological model analysis were conducted. The results indicate that the region is characterized by frequent moderate- to low-intensity earthquakes, strong weathering and unloading, historical mining activities, steep slopes with fractured rock structures and surface cracks; the development of loose deposits formed by terraced ancient landslides, rockfalls, alluvial deposits, and artificial accumulations at the base of the slope; and continuous rainfall triggering landslides and resulting in long-distance movement and deposition. Rock avalanches can be categorized into three types of disaster-related movement processes: slope rock mass instability and failure, cascading-scale amplification of scraping and plowing deposition bodies, and topography-constrained upheaval deposition. These findings provide reference data for analyzing the formation mechanisms and predicting the hazards of red-bedrock avalanches. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
FullText Text:
  Availability: 0
Header DbId: enr
DbLabel: Energy & Power Source
An: 192983176
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
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  Data: Mechanism and movement process of the '2.8' rock avalanche in Junlian County, Southwest China.
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  Data: <searchLink fieldCode="JN" term="%22Landslides%22">Landslides</searchLink>. May2026, Vol. 23 Issue 5, p1275-1289. 15p.
– Name: Subject
  Label: Subject Terms
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  Data: *<searchLink fieldCode="DE" term="%22Rockslides%22">Rockslides</searchLink><br />*<searchLink fieldCode="DE" term="%22Landslides%22">Landslides</searchLink><br />*<searchLink fieldCode="DE" term="%22Landslide+hazard+analysis%22">Landslide hazard analysis</searchLink><br />*<searchLink fieldCode="DE" term="%22Geological+research%22">Geological research</searchLink><br />*<searchLink fieldCode="DE" term="%22Rainfall%22">Rainfall</searchLink><br />*<searchLink fieldCode="DE" term="%22Earthquakes%22">Earthquakes</searchLink>
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  Label: Geographic Terms
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  Data: <searchLink fieldCode="DE" term="%22Southwest+China%22">Southwest China</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The Wumeng Mountain Area is located in the transitional zone between the Sichuan Basin and the Yungui Plateau and between the Yunnan–Guizhou Plateau and the Qianzhong Mountainous Region. Widely distributed geological structural masses, characterized by gently inclined, interbedded sandstones, mudstones, and shales, are highly susceptible to geohazards. Rock avalanches triggered by the coupled effects of rainfall, earthquakes, and anthropogenic activities frequently occur. On February 8, 2025, a rock avalanche occurred in Jinping village, Junlian County, resulting in the tragic loss of 29 lives. To elucidate the disaster mechanisms and movement processes, field investigations, LiDAR mapping, and geological model analysis were conducted. The results indicate that the region is characterized by frequent moderate- to low-intensity earthquakes, strong weathering and unloading, historical mining activities, steep slopes with fractured rock structures and surface cracks; the development of loose deposits formed by terraced ancient landslides, rockfalls, alluvial deposits, and artificial accumulations at the base of the slope; and continuous rainfall triggering landslides and resulting in long-distance movement and deposition. Rock avalanches can be categorized into three types of disaster-related movement processes: slope rock mass instability and failure, cascading-scale amplification of scraping and plowing deposition bodies, and topography-constrained upheaval deposition. These findings provide reference data for analyzing the formation mechanisms and predicting the hazards of red-bedrock avalanches. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=192983176
RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1007/s10346-026-02696-y
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 15
        StartPage: 1275
    Subjects:
      – SubjectFull: Rockslides
        Type: general
      – SubjectFull: Landslides
        Type: general
      – SubjectFull: Landslide hazard analysis
        Type: general
      – SubjectFull: Geological research
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      – SubjectFull: Rainfall
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      – SubjectFull: Earthquakes
        Type: general
      – SubjectFull: Southwest China
        Type: general
    Titles:
      – TitleFull: Mechanism and movement process of the '2.8' rock avalanche in Junlian County, Southwest China.
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            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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