Numerical analysis of the stability of heavily jointed rock slopes using PFC2D

Wang, C.; Tannant, Dwayne D.; Lilly, P.A.

doi:10.1016/s1365-1609(03)00004-2

Cited by 155 publications

(70 citation statements)

References 10 publications

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“…This technique is commonly used for modeling granular assemblages with purely frictional or bonded circular particles represented by discs and is now widely used to resolve rock engineering and geomechanics problems (e.g., Wang et al, 2003;Potyondy and Cundall, 2004;Tang et al, 2009aTang et al, , b, 2013Tang et al, , 2014.…”

Section: Distinct Element Modelingmentioning

confidence: 99%

Mechanism of the Donghekou landslide triggered by the 2008 Wenchuan earthquake revealed by discrete element modeling

Yuan

Tang

et al. 2014

Nat. Hazards Earth Syst. Sci.

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Abstract. The huge Donghekou landslide was triggered by the Wenchuan earthquake in 2008 with about 2.4 × 10 7 m 3 of rock displaced. The landslide is considered as an example of an earthquake-induced "ejection" event, where dislocated slope materials was expelled over a section of the slope, but the kinematic processes are not well understood. We used the 2-D granular discrete element method to characterize the kinematic behavior and mechanics of this "ejection landslide". The initial boundary conditions were applied along the ball-wall contacts by using derived velocities integrated from strong motion data with a duration of 125 s, including the peak acceleration near the Donghekou area. The constraints were primarily determined from the final geometry of the landslide and geological structures to account for the actual landslide characteristics. Simulated results showed that the large local seismic acceleration and a free face under the sliding body, caused by the dip difference between the upper slide face and the natural slope, originated from the activation of the landslide. For the lower sliding body, its kinematic mechanism was changed during sliding. Initially it was a push-type landslide, and then gradually changed to a retrogressive landslide. The eroded bed on the slope during the landslide had the potential of slightly increasing the runout distance from 1435 to 1519 m, and was predicted in the numerical simulation.

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Section: Distinct Element Modelingmentioning

confidence: 99%

Mechanism of the Donghekou landslide triggered by the 2008 Wenchuan earthquake revealed by discrete element modeling

Yuan

Tang

et al. 2014

Nat. Hazards Earth Syst. Sci.

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“…In the recent development of the DEM, bonded particle models are introduced to simulate the mechanical behavior of rock governed by growth and the eventual interaction of cracks (Potyondy and Cundall, 2004). This model has been used for a wide range of applications within geotechnical engineering (Wang et al, 2003;Utili and Nova, 2008).…”

Section: Methodologies and Techniques For The Development Of A Failurmentioning

confidence: 99%

Distinct Element Analysis for Progressive Failure in Rock Slope

Nishimura

Fukuda²,

Tsujino

2010

Soils and Foundations

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This paper investigates a numerical modeling of progressive failure in rock mass using the distinct element analysis. The numerical modeling consists of two processes. Theˆrst is to get the mechanical properties of synthetic specimens composed of circular rigid elements with the bonded eŠect between elements. The second is to analyze deformation of a reduced-scale rock slope under the gravity increased condition. With the calibrated properties of the synthetic specimen unchanged, an approach to initialize stress state in the slope model is studied. Evolution of displacements and the resulting initiation of failure surface in the slope model are displayed.

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“…Some researches have been done by PFC software, and also some papers have been submitted to different journals by Chang et al (2011), He et al (2010, Jackson et al (2008), Liu and Koyi (2012), Poisel et al (2009), Thompson et al (2009), Wang et al (2003, Ghazvinian et al (2012), Asadi et al (2012). This software is used to model the movements and interactions of spherical particles using the Distinct Element Method.…”

Section: Particle Flow Code (Pfc2d)mentioning

confidence: 99%

Measuring Displacement and Contact Forces Among the Particles in Unloading of Slope by PFC2D (Particle Flow Code) / Pomiary przemieszczeń i sił kontaktu pomiędzy cząstkami materialnymi w trakcie wybierania wyrobiska pochyłego przy pomocy programu PFC2D

Behbahani¹,

Moarefvand²,

Ahangari³

et al. 2013

Archives of Mining Sciences

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When instability is observed in the walls of open pit mining, at this time, engineers are faced with a moving mass which is a combination of materials that move on each other and on the main slip surface. Modeling of this movement can have an effective assistance to mining engineers to predict the movement behavior, displacement estimate, and the moving volumes. One of the suitable software which is capable of modeling of sliding behavior is PFC (Particle Flow Code). It is based on Discrete Element Method and released by the Itasca Company. In this paper, the modeling of sliding mass and unloading it in seven stages have been done. During the seven stages of unloading the maximum displacement and maximum contact forces among the particles are obtained. Maximum displacement happened in the fifth stage of the unloading and it is equal to 134.8 meters. Maximum contact forces occurred in the first stage of the unloading after initial equilibrium stage and it is equal to 1917 kN. The model for unloading of sliding mass presented in this paper is just an example and it is not a definite model for unloading of each sliding mass. Unloading of sliding mass depends on the situation of sliding mass and its volume and also mining limitations. Keyword: Unloading, Discrete Element Method (DEM), Sliding Mass, PFC2DW przypadku wystąpienia niestabilności ścian pochyłego wyrobiska odkrywkowego, inżynierowie mają do czynienia z przemieszczającą się masa -będącą kombinacją materiałów przesuwających się względem siebie a także zsuwających się w dół po powierzchni spadu. Modelowanie tego ruchu może znacznie pomóc inżynierom-górnikom w prognozowaniu zachowań terenu w trakcie tego ruchu, do szacowania wielkości przemieszczeń i objętości przemieszczających się mas materiału. Jednym z programów wspomagających modelowanie przemieszczeń tego typu jest oprogramowanie Particle Flow Code PFC, rozprowadzane przez firmę Itasca, wykorzystujące metodę elementów dyskretnych. W pracy tej

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Numerical analysis of the stability of heavily jointed rock slopes using PFC2D

Cited by 155 publications

References 10 publications

Mechanism of the Donghekou landslide triggered by the 2008 Wenchuan earthquake revealed by discrete element modeling

Mechanism of the Donghekou landslide triggered by the 2008 Wenchuan earthquake revealed by discrete element modeling

Distinct Element Analysis for Progressive Failure in Rock Slope

Measuring Displacement and Contact Forces Among the Particles in Unloading of Slope by PFC2D (Particle Flow Code) / Pomiary przemieszczeń i sił kontaktu pomiędzy cząstkami materialnymi w trakcie wybierania wyrobiska pochyłego przy pomocy programu PFC2D

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