Numerical modelling of rheological properties of landslide debris

Ray, Arunava; Verma, Harshal; Bharati, Ashutosh Kumar; Rai, Rakesh; Koner, Radhakanta; Singh, T. N.

doi:10.1007/s11069-021-05038-4

Cited by 13 publications

(5 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a numerical software based on the DEM method, the PFC3D introduced in this study has obvious advantages in modeling extremely large deformation behaviors of geo-material. Therefore, it has been widely applied in the simulation of geological disaster propagation, such as flow-like landslides [53,57], rock avalanches [63,64], and debris flows [41,65] with both dry and saturated source materials. The validity and reliability of the PFC models have been extensively verified.…”

Section: Limitations Of the Modeling Approachmentioning

confidence: 99%

“…Wu et al [40] established a 2D PFC model to analyze the dynamic response characteristics and deformation evolution process of loess slopes under seismic loads. Ray et al [41] applied the PFC method to model the rheological properties of a landslide debris in Uttarkashi, India. Therefore, the PFC model is suitable to simulate the propagation behavior of different types of landslides.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Propagation Modeling of Rainfall-Induced Landslides: A Case Study of the Shaziba Landslide in Enshi, China

Cheng

Dai

2023

Water

View full text Add to dashboard Cite

Geological disasters, especially landslides, frequently occur in Enshi County, Hubei Province, China. On 21 July 2020, a large-scale landslide occurred in Enshi due to continuous rainfall. The landslide mass blocked the Qingjiang River, formed a dammed lake and caused great damage to surrounding roads and village buildings. In this study, the geomechanical properties of the landslide mass were obtained through field surveys. A three-dimensional topography model of the slope was established using the particle flow code (PFC) and the numerical parameters of the model were calibrated. A 3D discrete element model (DEM) was used to simulate the propagation of Shaziba landslide, and the dynamic behavior of the landslide was divided into five stages. The simulation results show that the landslide movement lasted approximately 1000 s. The maximum average velocity of the landslide reached up to 7.5 m/s and the average runout distance was about 1000 m. The simulated morphology of the landslide deposits was in good agreement with the field data. In addition, the influence of effective modulus on the calculation results was analyzed. The results indicate that the propagation behavior of a landslide and the morphology of landslide deposits are closely related to the effective modulus in the contact model of the PFC3D.

show abstract

Section: Limitations Of the Modeling Approachmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Propagation Modeling of Rainfall-Induced Landslides: A Case Study of the Shaziba Landslide in Enshi, China

Cheng

Dai

2023

Water

View full text Add to dashboard Cite

show abstract

“…The fluid is in a state of viscous laminar flow or dilute turbulent flow [14]. Because a debris flow is a two-phase fluid flow that includes solid and liquid phases, and the PFC 3D (version 6.0) numerical simulation software uses the discrete element method to calculate the particle-particle interaction of the fluid, the software can effectively simulate the movements and interactions of solid particles in the debris flow; the CFD fluid module in the software can simulate the effect of water on solid particles in the debris flow [15]. Therefore, most scholars currently use the PFC particle flow software to conduct numerical simulation research on debris flow.…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of Ore-Drawing Shear Factor on Underground Debris Flow in the Block Caving Method

Niu,

Zhe,

Sun

et al. 2023

Water

View full text Add to dashboard Cite

The shear factor of ore drawing is an important factor affecting the formation of underground debris flows. The aim of this study was to investigate the effect of the mining shear factor on underground debris flows in natural caving. The research background was the underground debris flow in the Plan copper mine, and we analyzed the characteristics of the slurry material structure of the underground debris flow, as well as the influence of the ore-drawing shear factor on the formation mechanism of the underground debris flow. The results showed that the slurry of the underground debris flow in the Plan mine is both a pseudoplastic and thixotropic fluid. Shearing force induced in drawing deforms the slurry and decreases its viscosity with the increase in shear rate and time. The shear force produced by the flow of ore particles first produces shear action on the paste in the shear boundary region of the ore drawing, reducing the paste viscosity while increasing its fluidity. Consequently, the “activation” makes the paste flowable, which flows along with the bulk ore flowing through the drawing mouth. The continuous ore-drawing process continuously shears the new moraine slurry in the ore-drawing channel and continuously “activates” the moraine slurry in the ore-drawing channel. Finally, destructive underground debris flow accident of a certain scale occurs. To our knowledge, this study thoroughly investigated the effect of the ore-drawing shear factor on the formation mechanism of underground debris flows, which not only broadens the research field of debris flow but also covers the deficiency of systematic research on underground debris flows, providing theoretical guidance for the prevention and control of underground debris flows.

show abstract

“…In the actual operation of a homogeneous earth-rock dam, it is always encountered multiple disaster factors such as rainfall and water level fluctuations work together. 6 At this time, some safety problems may occur in the dam body, such as crack expansion, 7 slope instability, [8][9][10] deformation failure, [11][12][13] and seepage failure. 14,15 The fluctuation of the reservoir water level is a direct factor affecting the stability of the dam slope, which causes the soil inside the slope immersed, leading to the decrease of the soil strength parameters and the deterioration of the soil properties.…”

Section: Introductionmentioning

confidence: 99%

Dynamic risk assessment of slope stability of homogeneous earth-rock dam under action of multiple hazards

Zhang

Liu

2022

SIMULATION

View full text Add to dashboard Cite

During actual service of the reservoir dam, there always appears a combination of water level fluctuations, rainfalls, and other hazard factors. During these times, the safety state of the dam is a dynamic process, and the dynamic risk assessment of dam slope stability which considers the time scale is of great importance. Therefore, in this study, the dynamical stability of the earth-rock dam under the combined action of multiple hazards is studied by using the Monte Carlo method, considering the spatial variability of the soil of dam and the coupling effect of the seepage field and the stress field. The failure probability and reliability index of dam under each working condition are calculated to determine the most dangerous working condition during the disaster-causing process. For the upstream slope, the most dangerous condition appears at the moment when the water level drops at a rate of 2 m/d with a 40 mm/d rainfall intensity, while the most dangerous condition of the downstream slope is that when the water level rises at a rate of 2 m/d with a 40 mm/d rainfall intensity. The influence of various disaster factors on the stability of dam is revealed and corresponding engineering early warning measures are proposed. This study realizes the dynamic risk assessment of dam slope stability under multiple hazards, avoids the limitation of evaluating the dam slope stability with a single safety factor, and provides a reference for risk analysis and emergency management of reservoir dams under the action of multiple hazards.

show abstract

Numerical modelling of rheological properties of landslide debris

Cited by 13 publications

References 29 publications

Propagation Modeling of Rainfall-Induced Landslides: A Case Study of the Shaziba Landslide in Enshi, China

Propagation Modeling of Rainfall-Induced Landslides: A Case Study of the Shaziba Landslide in Enshi, China

Study on the Effect of Ore-Drawing Shear Factor on Underground Debris Flow in the Block Caving Method

Dynamic risk assessment of slope stability of homogeneous earth-rock dam under action of multiple hazards

Contact Info

Product

Resources

About