区域应力场与岩质滑坡的关系: 以2022年泸定Ms6.8级地震区为例

孔维林; 伍纯昊; 崔鹏; 张亦凡; 李渝生

doi:10.3799/dqkx.2024.074

Volume 50 Issue 1

Jan. 2025

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Kong Weilin, Wu Chunhao, Cui Peng, Zhang Yifan, Li Yusheng, 2025. The Relationship between Regional Stress Field and Rock Landslide: A Case Study of the 2022 Luding Ms6.8 Earthquake. Earth Science, 50(1): 299-310. doi: 10.3799/dqkx.2024.074

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Kong Weilin, Wu Chunhao, Cui Peng, Zhang Yifan, Li Yusheng, 2025. The Relationship between Regional Stress Field and Rock Landslide: A Case Study of the 2022 Luding M_s6.8 Earthquake. Earth Science, 50(1): 299-310. doi: 10.3799/dqkx.2024.074

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The Relationship between Regional Stress Field and Rock Landslide: A Case Study of the 2022 Luding M_s6.8 Earthquake

doi: 10.3799/dqkx.2024.074

Kong Weilin^{1, 4
,
,},
Wu Chunhao^{2
,
,
,},
Cui Peng^{1, 3, 4},
Zhang Yifan^{2, 4},
Li Yusheng¹

1.
Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
2.
Key Laboratory of Mountain Hazards and Surface Process/Institute of Mountain Hazards and Environment, Chinese Academy of Sciences (CAS), Chengdu 610041, China
3.
China-Pakistan Joint Research Center on Earth Sciences, CAS-HEC, Islamabad 45320, Pakistan
4.
University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2024-04-24
Available Online: 2025-02-10
Publish Date: 2025-01-25

Abstract

Abstract

Various tectonic phenomena occurring on and beneath the Earth's surface, and the associated geological disasters, are closely related to regional stress fields. However, the quantitative relationship between regional stress fields and landslide density or size is not yet clear. This paper utilizes a high-resolution three-dimensional stress field model that accounts for fault and topographic influences, combined with rock damage data, to analyze the relationship between the size and density of rock landslides and different stress parameters before and after the Luding M_s6.8 earthquake on September 5, 2022. The results indicate that stress field shows a strong correlation with rock landslides. A significant positive correlation exists between the maximum shear stress and both the upper area limit and density of rock landslides. Areas of high maximum shear stress align closely with the spatial distribution of rock landslides before and after the earthquake, with over 90% of the landslides occurring above a threshold of 6.95 MPa in maximum shear stress. The stress fields, disturbed by topography and faults, control the development of structural planes in the rock, creating the necessary material conditions for the formation of rock landslides. This study emphasizes that the occurrence of rock landslides is not merely a simple process triggered by random factors, but a complex process influenced by ground stress, topography, and geological structures.
- stress field,
- maximum shear stress,
- fault,
- rock landslide,
- rock damage,
- disaster geology

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References(61)

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The Relationship between Regional Stress Field and Rock Landslide: A Case Study of the 2022 Luding Ms6.8 Earthquake

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The Relationship between Regional Stress Field and Rock Landslide: A Case Study of the 2022 Luding M_s6.8 Earthquake