Model test study on sliding-toppling composite deformation evolution of anti-dip layered rock slope

Gong, Yifei; Ye, Aijun; Liu, Yanlin; Li, Yanyan; Li, Yanan; Sun, Yu

doi:10.1007/s10064-023-03213-4

Cited by 14 publications

(5 citation statements)

References 49 publications

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“…Landslide density (Ld, Figure 2a): This reflects the material supply for debris flows, thereby influencing the scale of debris flows. When a landslide occurs, a large amount of soil and rocks may collapse [32,33], forming landslide dams that block the channel. If a debris flow occurs at this time, it can result in dam-break effects, amplifying the scale of the debris flow and increasing the likelihood of river blockage.…”

Section: Remote Sensing Interpretation and Gis Analysismentioning

confidence: 99%

Early Identification of River Blockage Disasters Caused by Debris Flows in the Bailong River Basin, China

Zeng,

Zhao,

Zheng

et al. 2024

Remote Sensing

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The Bailong River Basin is one of the most developed regions for debris flow disasters worldwide, often causing severe secondary disasters by blocking rivers. Therefore, the early identification of potential debris flow disasters that may block the river in this region is of great significance for disaster risk prevention and reduction. However, it is quite challenging to identify potential debris flow disasters that may block rivers at a regional scale, as conducting numerical simulations for each debris flow catchment would require significant time and financial resources. The purpose of this article is to use public resource data and machine learning methods to establish a relationship model between debris flow-induced river blockage and key influencing factors, thereby economically predicting potential areas at risk for debris flow-induced river blockage disasters. Based on the field investigation, data collection, and remote sensing interpretation, this study selected 12 parameters, including the basin area, basin height difference, relief ratio, circularity ratio, landslide density, fault density, lithology index, annual average frequency of daily rainfall exceeding 40 mm, river width, river discharge, river gradient, and confluence angle, as critical factors to determine whether debris flows will cause river blockages. A relationship model between debris flow-induced river blockage and influencing factors was constructed based on machine learning algorithms. Several machine learning algorithms were compared, and the XGB model performed the best, with a prediction accuracy of 0.881 and an area under the ROC curve of 0.926. This study found that the river width is the determining factor for debris flow blocking rivers, followed by the annual average frequency of daily rainfall exceeding 40 mm, basin height difference, circularity ratio, basin area, and river discharge. The early identification method proposed in this study for river blockage disasters caused by debris flows can provide a reference for the quantitative assessment and pre-disaster prevention of debris flow-induced river blockage chain risks in similar high-mountain gorge areas.

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Section: Remote Sensing Interpretation and Gis Analysismentioning

confidence: 99%

Early Identification of River Blockage Disasters Caused by Debris Flows in the Bailong River Basin, China

Zeng,

Zhao,

Zheng

et al. 2024

Remote Sensing

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“…Based on previous studies in field investigations and physical model experiments (Weng et al 2020;Zhu et al 2020;Dong et al 2020;Cheng et al 2021;Liu et al 2021;Ding et al 2021;Tao et al 2021;Wang et al 2022;Yang et al 2022;Xie et al 2023;Beng et al 2023;Gong et al 2023;Zheng et al 2023), the geometric characteristics of slopes and rock strata are simplified, and then a representative numerical model of anti-dip rock slopes is constructed. As shown in Fig.…”

Section: Establishment Of the Numerical Modelmentioning

confidence: 99%

Investigating the evolution chain of deformation and destabilisation of anti-dip rock slopes

Ma,

Li,

Wang

et al. 2023

Preprint

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With the continuous promotion of engineering construction in western China, it is increasingly acknowledged that the frequency and harmfulness of deformation and destabilisation of anti-dip rock slopes are comparable to those of dip rock slopes. Due to the characteristic "no pre-existing weak planes" of anti-dip rock slopes, the cumulative deformation and fracture of rock strata result in slope destabilisation. Focusing on the evolution chain "deformation of rock strata - damage (or fracture) of rock strata - slope destabilisation", this study investigates the mechanisms of deformation and destabilisation of anti-dip rock slopes through a numerical simulation method. For the anti-dip rock slope with a large dip angle of the rock strata, the significant stress characteristic of the rock strata "tension near the upper surface - compression near the lower surface" results in obvious flexural deformation and tensile fracture. The slope undergoes long-term damage and eventually occurs destabilisation. This stress characteristic gradually diminishes and eventually vanishes with decreasing dip angle of the rock strata. The resulting initiation mode of slope destabilisation transitions from tensile fracture to compressive fracture of the rock strata at the slope toe. Meanwhile, the destabilisation mode of slopes transitions from toppling type to sliding type, and the corresponding failure boundary transitions from dual stage toppling-fracture type to multistage sliding type. Moreover, the combined effects of the slope angle and the dip angle of the rock strata are discussed during the process of deformation and destabilisation of anti-dip rock slopes.

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“…Four different methods are commonly used to study the stability of anti-dip rock slopes: (a) in situ investigations [12,13], (b) laboratory similar testing with rock-like materials [14][15][16], (c) theoretical and analytical methods (e.g., the limit equilibrium method) [17][18][19], and (d) numerical simulation methods [5,20,21]. In situ investigations can provide valuable information about a rock slope before (e.g., the geological condition) and after (e.g., the failure characteristics) slope failure but cannot reveal the evolutionary process or instability mechanism of the slope.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Interbedded Anti-Dip Rock Slopes Based on Discrete Element Modeling: A Case Study

Li,

Yue,

et al. 2023

Applied Sciences

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Varying geological conditions and different rock types lead to complex failure modes and instability of interbedded anti-dip rock slopes. To study the characteristics of failure evolution of interbedded anti-dip slopes, a two-dimensional particle flow code (PFC2D) based on the discrete element method (DEM) was utilized to establish an interbedded anti-dip rock slope numerical model for the Fushun West Open-pit Mine based on the true geological conditions and field investigations. The slope model with an irregular surface consists of interbedded mudstone and brown shale as two different rock layers, and a number of small-scale rock joints are randomly distributed in the rock layers. The influence of different inclination angles (20° and 70°) of the rock layer and slope angles (60° and 80°) on the stability of interbedded anti-dip rock slopes was considered. The evolution of the failure progress was monitored by the displacement field and force field. The simulation results showed that the rock joints in the rock stratum promoted crack initiation and increased the crack density but did not change its shear-slip failure mode. A large inclination angle of the rock layers and slope angle can lead to topping slip failure along the slip zone. However, shear-slip instability generally occurs in interbedded anti-dip rock slopes with small inclination angles of the rock layer and small slope angles. These results can contribute to a better understanding of the failure mechanism of interbedded anti-dip rock slopes under different geological conditions and provide a reference for disaster prevention.

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Model test study on sliding-toppling composite deformation evolution of anti-dip layered rock slope

Cited by 14 publications

References 49 publications

Early Identification of River Blockage Disasters Caused by Debris Flows in the Bailong River Basin, China

Early Identification of River Blockage Disasters Caused by Debris Flows in the Bailong River Basin, China

Investigating the evolution chain of deformation and destabilisation of anti-dip rock slopes

Numerical Analysis of Interbedded Anti-Dip Rock Slopes Based on Discrete Element Modeling: A Case Study

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