A case study of a giant reactivated landslide based on NPR anchor cable Newton force early warning

In a large ancient landslide, approximately 240,000 m 3 of sediments were reactivated, posing a grave threat to the safety of iron ore stopes. To trace the deformation and evolution history of reactivated Landslide, we conducted geological surveys and combined real-time monitoring equipment to analy...

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Bibliographic Details
Published in:Journal of mountain science 2023-11, Vol.20 (11), p.3283-3294
Main Authors: Guo, Long-ji, Tao, Zhi-gang, He, Man-chao, Liu, Jian-ning, Coli, Massimo
Format: Article
Language:English
Subjects:
Aquatic reptiles
Case studies
Deformation
Dredging
Early warning systems
Earth and Environmental Science
Earth Sciences
Ecology
Environment
Evolution
Excavation
False alarms
Geography
Geological hazards
Geological surveys
Iron ores
Landslides
Landslides & mudslides
Monitoring
Monitoring methods
Open pit mining
Original Article
Real time
Sediments
Surface cracks
Surface stability
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Summary:In a large ancient landslide, approximately 240,000 m 3 of sediments were reactivated, posing a grave threat to the safety of iron ore stopes. To trace the deformation and evolution history of reactivated Landslide, we conducted geological surveys and combined real-time monitoring equipment to analyze the landslide data since 1986 and the deformation status of the reactivated Landslide. A multi-factor comprehensive landslide monitoring method and an Newton force early warning system (NFEWS) were established, focusing on underground stress, surface deformation information and landslide stability. Furthermore, we developed a four-level early warning grading standard, employing surface cracks and changes in underground stress thresholds as early warning indicators. This standard adds expert assessment to avoid false alarms and realize real-time dynamics of mining landslides during excavation and transportation. Through the case study and analysis of Nanfen open-pit mine, the NFEWS system offers valuable insights and solution for early warning of landslides in analogous open-pit mines. Finally, the evaluation index system of landslide hazard susceptibility was established by selecting the Newton force influence factor. A landslide susceptibility zoning map is constructed using the information value model. The rationality and accuracy are assessed from three perspectives: frequency ratio, landslide hazard point density, and receiver operating characteristic (ROC) curve. The improved Newton force landslide early warning system provides a good reference for the analysis and monitoring of the creep landslide evolution process.
ISSN:1672-6316
1993-0321
1008-2786
DOI:10.1007/s11629-023-8097-3