Study on the development laws and mitigation of geological hazards in Dingri <i>M</i><sub>s</sub> 6.8 earthquake region, Xizang Autonomous Region

TIE Yongbo; GAO Yunjian; ZHANG Xianzheng; SHI Anwen; HUANG Wenjie; QIN Yadong; LI Zongliang; DONG Lei; NING Zhijie

doi:10.19826/j.cnki.1009-3850.2025.01002

Sedimentary Geology and Tethyan Geology > 2025 > 45(1): 212-224. > DOI: 10.19826/j.cnki.1009-3850.2025.01002

TIE Y B，GAO Y J，ZHANG X Z，et al.，2025. Study on the development laws and mitigation of geological hazards in Dingri M_s 6.8 earthquake region, Xizang Autonomous Region[J]. Sedimentary Geology and Tethyan Geology，45(1)：212−224. DOI: 10.19826/j.cnki.1009-3850.2025.01002

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Study on the development laws and mitigation of geological hazards in Dingri M_s 6.8 earthquake region, Xizang Autonomous Region

TIE Yongbo^{1, 2, 3,},
GAO Yunjian^{1, 2, 3},
ZHANG Xianzheng^{1, 2, 3},
SHI Anwen^{1, 2, 3},
HUANG Wenjie^{2, 4},
QIN Yadong^{1, 2, 3},
LI Zongliang^{1, 2, 3},
DONG Lei⁵,
NING Zhijie^{1, 2, 3}

1.
Chengdu Center, China Geological Survey (Geosciences Innovation Center of Southwest China), Chengdu 610218, China
2.
Technology Innovation Center for Risk Prevention and Mitigation of Geohazards, Ministry of Natural Resources, Chengdu 610000, China
3.
Observation and Research Station of Chengdu Geological Hazards, Ministry of Natural Resources, Chengdu 610000, China
4.
Exploration Technology Research Institute of China Geological Survey, Chengdu 611734, China
5.
The Second Geological Brigade of Xizang Autonomous Region Geological and Mineral Exploration and Development Bureau, Lhasa 850000, China

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Received Date: January 19, 2025
Revised Date: January 21, 2025
Accepted Date: February 04, 2025

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Abstract

Abstract

On January 7^th, 2025, an M_s 6.8 earthquake occurred in Dingri County, Xizang Autonomous Region, triggering coseismic geological hazards and causing deformation of some existing geological hazards. In order to deeply analyze their development trend and potential risks, based on primary data obtained from on-site emergency investigation and comprehensive studies of regional geological data, this paper studies the development and distribution characteristics as well as disaster prevention and reduction countermeasures of the geological disasters in the earthquake area. The results show that 868 geological disaster sites, including landslides, debris flows, collapses and ground cracks, were identified before the earthquake, and this number increased by 91 after the earthquake. The scales of the disasters were mainly small and medium; 107 geological disaster sites were significantly or slightly changed due to the earthquake. It is believed that, although the earthquake did not cause a large number of coseismic geological hazards, it will still have a certain impact on the stability of high mountains, glaciers, glacial lakes, etc. It is necessary to further carry out detailed investigation and evaluation in the earthquake area, and to pay attention to the research and evaluation of the genetic mechanism of sand liquefaction in the valley area, as well as to investigate the potential risks that may be posed to regional towns and engineering constructions. The research results of this paper can provide a scientific reference for the determination of key areas and objects of geological disaster investigation and post-disaster reconstruction planning in the Dingri County earthquake area.

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References (41)

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Study on the development laws and mitigation of geological hazards in Dingri M_s 6.8 earthquake region, Xizang Autonomous Region

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Study on the development laws and mitigation of geological hazards in Dingri Ms 6.8 earthquake region, Xizang Autonomous Region

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Study on the development laws and mitigation of geological hazards in Dingri M_s 6.8 earthquake region, Xizang Autonomous Region