Influence of Rainfall Intensity and Slope on the Slope Erosion of Longling Completely Weathered Granite

Tian, Haojun; Kong, Zhaochen

doi:10.3390/app13095295

Cited by 5 publications

(3 citation statements)

References 6 publications

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“…Gao Anqi et al [18] obtained the surface deformation rule of a slope-affected area through a detailed investigation of buildings in the urban area around the Fushun West Open-Pit Mine, a comprehensive analysis of urban geological conditions, surface monitoring data, and numerical simulation. Based on the indoor 60 min simulated rainfall test, Tian, H. [19] found that the rainfall intensity and slope are two key factors that determine slope velocity and summarized the functional relationship between them.…”

Section: Introductionmentioning

confidence: 99%

Stability and Distribution of Rock Slope under Asymmetric Excavation

Li,

Xiang,

Shen

et al. 2024

Applied Sciences

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The asymmetric excavation unloading activity of a rock slope with a fault has an important influence on the stability of the slope and the division of the surrounding surface influence area. Based on the engineering background of the West Open-Pit Mine in Fushun City, orthogonal testing, K-means clustering, range analysis, and variance analysis were used to study the linkage mechanism of the asymmetric excavation unloading action and the weak structure in the rock slope, as well as their effects on slope stability and the influence area. This analysis showed that the significant factors affecting the stability zones of the north and south slopes were the excavation inclination angles of the opposite slopes. When the excavation inclination of the north slope increased by 10 degrees, the safety factors decreased by 25.9% and 16.6%. When the excavation inclination of the south slope increased by 10 degrees, the safety factors decreased by 13.7% and 1.9%. A second significant factor was the excavation depth. The occurrence of faults in the slope was the main factor affecting the range of slope instability. In order to ensure production safety, the excavation inclination angle of a slope with a fault should be limited to no more than 40°, and the excavation depth of an unstable area with two slopes should be designed to be no more than 450 m. The influence of asymmetric excavation unloading on the stability of a rock slope with a fault structure is expounded. This also provides a theoretical basis for controlling slope stability and influence areas in large-scale open-pit mining projects.

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Section: Introductionmentioning

confidence: 99%

Stability and Distribution of Rock Slope under Asymmetric Excavation

Li,

Xiang,

Shen

et al. 2024

Applied Sciences

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“…In the actual process of erosion, the simultaneous influence of various factors makes the soil erosion process complex. Previous research has demonstrated that artificially simulated rainfall experiments are an effective method for investigating soil erosion processes and their influencing factors [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Runoff and Sediment Production of the Fully Weathered Granite Backfill Slope under Heavy Rain in Longling, Yunnan Province

Gao,

Kong,

et al. 2024

Sustainability

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Heavy or intermittent rainfall can cause slopes to become unstable and erode, resulting in significant damage, loss of life, and destruction of property. Targeted management solutions are based on an analysis of slopes’ flow generation and sediment production patterns during periods of rainfall. This study used a fully granite backfill slope as its research subject and examined the features of slope erosion during intermittent rainfall. We examined the processes of slope flow generation and soil erosion during intermittent rain through indoor artificially simulated rainfall experiments. Three intermittent rainfall events with a 220 mm/h intensity were designed during the experiment. Each rainfall event lasted for 60 min, with an interval of 60 min between the events. By analyzing multiple rainfall events, this study reveals the patterns of runoff and sediment yield on different slopes in response to variations in rainfall intensity and slope gradient. The runoff volume on other slope surfaces exhibits a similar pattern in reaction to changes in rainfall events. As the frequency of rainfall events increases, the surface runoff tends to be higher. Additionally, with variations in slope steepness, the runoff volume generally follows an increasing trend. Notably, the slope with a 20° incline shows the smallest runoff volume. The sediment yield on different slope surfaces gradually increases as the slope increases. In particular, on a 20° slope, the sediment yield experiences a substantial increase, indicating that the impact of the slope on the sediment yield becomes more pronounced. In different rainfall events, the morphology of the slope changes due to the influence of gravity and hydraulics, resulting in oscillations in both the average runoff rate and sediment yield. Furthermore, as the slope steepens, the amplitude of these oscillations increases. The process of slope erosion involves three stages: raindrop splash erosion, runoff erosion, and collapse damage. The sequence of slope damage locations is as follows: footslope, mid-slope, and hilltop. For the backfilled slope of completely weathered granite, the artificial slope can be controlled to around 20°. Erosion on the slope mainly occurs after the formation of gullies, and slope management should focus on preventing gully formation before it happens.

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“…Apart from herbs, slope gradient and flow discharge were identified as important factors influencing the hydraulic characteristics of slope runoff. Tian et al conducted artificial rainfall experiments and concluded that slope gradient is a key determinant of slope flow velocity (Tian and Kong, 2023). Huang et al suggested that higher slope gradients result in greater water flow energy and surface velocity (Huang et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Effects of herbaceous morphology changes on the hydrodynamic characteristics of rocky desertification sloping farmland based on flume experiments

Wang,

Yan,

Dai

et al. 2024

Preprint

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The process of herbaceous vegetation decay can impact the hydraulic characteristics of slope runoff, thereby affecting soil erosion. However, there have been limited studies quantifying the influence of this decay process on the runoff hydraulic characteristics within soil patches on rocky desertification slopes. In this study, we conducted indoor erosion experiments using simulated fragmented soil patches of rocky desertification slopes in a flume. The experiments involved three different surface cover morphologies during the herbaceous decay process (overall morphology, root morphology, and bare ground), three slope gradients (5°, 15°, and 25°), and three flow discharges (0.03, 0.10, and 0.16 L·s− 1). Our findings indicate that the hydraulic parameters of slope runoff respond differently to changes in slope gradient and flow discharge. The mean flow velocity is the most responsive to variations in slope vegetation morphology. On bare ground slopes, the mean flow velocity was 12% and 22% higher compared to root and overall slopes, respectively. The Froude number and runoff shear stress are the main factors that alter the hydraulic characteristics of slope runoff under the combined effects of slope gradients, flow discharge, and morphology changes. The Froude number increased by 917%, and the runoff shear stress increased by 836% due to the combined effects of slope, flow discharge, and morphology changes. These research findings provide substantial evidence for enhancing the comprehension of the mechanisms through which the decay of herbaceous vegetation impacts slope hydraulic processes. Moreover, they offer a scientific foundation for enhancing the predictive accuracy of soil erosion process models.

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Influence of Rainfall Intensity and Slope on the Slope Erosion of Longling Completely Weathered Granite

Cited by 5 publications

References 6 publications

Stability and Distribution of Rock Slope under Asymmetric Excavation

Stability and Distribution of Rock Slope under Asymmetric Excavation

Experimental Study on Runoff and Sediment Production of the Fully Weathered Granite Backfill Slope under Heavy Rain in Longling, Yunnan Province

Effects of herbaceous morphology changes on the hydrodynamic characteristics of rocky desertification sloping farmland based on flume experiments

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