The Stability Analysis of Tailings Dam under the Fluid-Solid Coupled Interaction

2012 ◽  
Vol 204-208 ◽  
pp. 3078-3081
Author(s):  
Kun Yang ◽  
Hao Han ◽  
Zhi Chao Ma
Keyword(s):  
Stability Analysis ◽  
Coupled Model ◽  
Simulation Method ◽  
Practical Significance ◽  
Coupled Analysis ◽  
Tailings Dam ◽  
Sliding Surface ◽  
Seepage Field ◽  
Coupling Analysis ◽  
The Stability

Numerical simulation method is adopted to analysis the stability of tailings dam under the fluid-solid coupled interaction. Using the full-coupled analysis function, stress field 、seepage field and their coupled model are studied in this paper. Finally, the critical sliding surface of the tailings dam is searched. Results show that the safety factor after coupling is smaller than before. It illustrates that the fluid-solid coupling analysis has an important practical significance for the stability analysis of tailings dam.

scholarly journals Dynamic response of Zelazny Most tailings dam to mining induced extreme seismic event occurred in 2016

2019 ◽  
Vol 262 ◽  
pp. 01001
Author(s):  
Aleksandra Korzec ◽  
Waldemar Świdziński
Keyword(s):  
Stability Analysis ◽  
Dynamic Response ◽  
Dynamic Loading ◽  
Time Integration ◽  
Horizontal Displacement ◽  
Material Model ◽  
Implicit Time ◽  
Tailings Dam ◽  
Peak Horizontal Acceleration ◽  
The Stability

The paper deals with the stability analysis of tailings dam subjected to dynamic loading induced by mining shocks which occurred in neighbouring copper mine. The main goal of the paper was to model the dynamic response of the dam during two extreme paraseismic events which occurred in 2016 based on accelerograms recorded at the dam toe. Dynamic response of the tailings dam was calculated using finite element method and the implicit time-integration method implemented in commercial codes. The boundary condition corresponding to dynamic loading was determined by deconvolution procedure. The error analysis showed that most precise signal reproduction is achieved while using target signal with peak value reduced by 40% as a test signal. Both acceleration and displacement time-series were successfully reproduced. Moreover, the stability analysis was conducted for five independent signals with design peak horizontal acceleration and showed that no permanent displacements should occur. The temporary horizontal displacement of the dam crest should not exceed 13 mm, assuming equivalent linear material model.

The Characteristics of Seepage Field and Numerical Analysis on the Stability of Reservoir Landslide

2012 ◽  
Vol 594-597 ◽  
pp. 2512-2519 ◽  
Author(s):  
Xiao Song Tang ◽  
Ying Ren Zheng ◽  
Yong Fu Wang
Keyword(s):  
Water Level ◽  
Permeability Coefficient ◽  
Underground Water ◽  
Strength Reduction ◽  
Seepage Field ◽  
Coupling Analysis ◽  
Reservoir Landslide ◽  
Water Level Changes ◽  
Quantitative Basis ◽  
The Stability

The stability of reservoir landslide would be influenced obviously by the fluctuation of water level, especially when the water descends, which is different from common landslide. Due to the unsteady seepage of underground water inside slope caused by the change of water level, the stability analysis of reservoir landslide through fluid-solid coupling is very complicated. At present, most people hold the view qualitatively that the less the permeability coefficient is and the faster the water level changes, the more unfavorable it is to the stability. This view lacks quantitative basis. Based on FEM strength reduction, the paper analyzes the influence of different sets of descending speed and permeability coefficient on the stability of reservoir landslide through fluid-solid coupling analysis. The paper also conducts the relevant analysis on the change of the characteristics of seepage field inside the slope, which provides basis for the study of the failure mechanism and the forecast of reservoir landslide.

Seepage-Stability Analysis of a Mine Tailings Dam in Yunnan Province Based on ANSYS

2012 ◽  
Vol 226-228 ◽  
pp. 1406-1410
Author(s):  
Shu Qi Ma ◽  
Si Jing Cai ◽  
Miao Guo
Keyword(s):  
Stability Analysis ◽  
Mine Tailings ◽  
Yunnan Province ◽  
Reduction Method ◽  
Field Analysis ◽  
Dam Safety ◽  
Tailings Dam ◽  
Ansys Software ◽  
Safety Coefficient ◽  
The Stability

As a major hazard installation in mine the safe and effective running of a tailings dam is very important, therefore the stability analysis of tailings dam is necessary. In order to evaluate the effect of seepage on stability of mine tailings dam, in this paper, a numerical model of a tailings dam in Yunnan province was established by using ANSYS software. It was focused on the dam seepage field analysis and the seepage-stability analysis, and on using the strength reduction method to derive the safety coefficient of the tailings dam. The results were proved reasonable and could be used to provide helpful guidance of dam safety.

The Stability Analysis on Reservoir Bank Slope of Granite Stained Subgrade

2011 ◽  
Vol 250-253 ◽  
pp. 1711-1716
Author(s):  
Li Chao Wang ◽  
Ping Gen Zhou
Keyword(s):  
Stability Analysis ◽  
Rigid Body ◽  
Limit Equilibrium ◽  
Limit Equilibrium Method ◽  
Dynamic Compaction ◽  
Sliding Surface ◽  
Bank Slope ◽  
The Stability ◽  
Safety Operation ◽  
Reservoir Bank Slope

The limit equilibrium method for rigid body is used to analyze the stability of subgrade reservoir bank slope of granite stained. The sliding of subgrade reservoir bank slope reinforced by dynamic compaction along the interface will not be happened. In the most unfavorable conditions , the sliding surface will be formed inside the stained subgrade, which threatened to the safety operation of the expressway.

Dynamic Simulation Method for Hard-Rock Pillar Failure in Open-Stope Goaf

2014 ◽  
Vol 556-562 ◽  
pp. 4055-4060
Author(s):  
Hai Tao Ma ◽  
Jin An Wang
Keyword(s):  
Stability Analysis ◽  
Load Transfer ◽  
Hard Rock ◽  
Simulation Method ◽  
Collapse Load ◽  
Quantitative Criterion ◽  
The Stability ◽  
Made In ◽  
Area Data

An attempt to simulate the cascading pillar collapse is made in this paper for a quick evaluation of a large number of mined-out area data that have been collected throughout China. Pillar collapse, load transfer and load redistribution are modeled by the area-apportioned method, and this methodology is general in sense and has been implemented in the expert system developed by the authors as an independent module. The proposed method can provide a quantitative criterion for determination of the failure pattern and identification of the key pillars in the stability analysis of the mined-out area formed by a pillar-room method.

Study on the Mechanism of the Landslide of Heda Expressway K377

2011 ◽  
Vol 255-260 ◽  
pp. 3437-3443 ◽  
Author(s):  
Lei Nie ◽  
Min Zhang ◽  
He Qing Jian
Keyword(s):  
Shear Strength ◽  
Stability Analysis ◽  
Structural Characteristics ◽  
Initial Slope ◽  
Economic Losses ◽  
Cut Slope ◽  
Sliding Surface ◽  
Slope Excavation ◽  
Geological Conditions ◽  
The Stability

During the construction of Heda expressway, the Ermi landslide, which occurred on section K377, has interrupted the construction of the expressway. Additional engineering geological investigation became necessary. The direct economic losses are over 3 million US dollars. This paper analyzed the Ermi landslide from the aspects of formation process, engineering geological conditions, the structural characteristics and stability analysis of the landslide. The results show that the formation of the Ermi landslide is mainly due to geological conditions in project area. Because the structure of the sliding body is loose and some weak interlayer exists in the slope, the shear strength of the sliding surface and sliding body is low. As cut-slope excavating, the resistant of the slope body reduced. Eventually the slope lost its stability and a landslide formed. In the stability analysis of the slope, the shear strength parameters of the sliding surface was determined by anti-analysis. Therefore, the result of the evaluation is closer to the actual conditions. Analyzing the stability of the three sliding surfaces respectively, the stability factors for initial slope are between 1.211 and 1.468, and the stability factors for current slope are between 0.958 and 1.076. Hence, the cut-slope excavation is the direct cause of the landslide.

Numerical Simulation Study on Technology of the Top-Down Bored Excavation with Cast-In Situ Arch

2015 ◽  
Vol 744-746 ◽  
pp. 1027-1032
Author(s):  
Zhong Ren Wang
Keyword(s):  
Numerical Simulation ◽  
Simulation Method ◽  
Practical Significance ◽  
Top Down ◽  
Optimization Analysis ◽  
Flac 3D ◽  
The Stability ◽  
Specific Project ◽  
Stability Of Structure

The top-down bored excavation with cast-in-situ arch method has many advantages, such as forming a complete and stable mechanical structure, reducing construction procedures and the frequency of structure transformation, improving the stability of structure during the construction and so on. According to the specific project of single span top-down bored excavation duct in Changchun Liberation Road station, numerical simulation method is used and finite difference software FLAC 3D is adopted in this paper to analyze and research the applicability of the top-down bored excavation with cast-in-situ arch method to this project. Then optimization analysis for excavation sequence of pilot tunnel is done and the optimum construction scheme is raised to guide the practical project. This research has certain practical significance and also provides references for similar projects.

Stability Numerical Simulation of Daping Landslide Group to Sunjiaya Tunnel

2012 ◽  
Vol 170-173 ◽  
pp. 413-417
Author(s):  
Wen She He ◽  
Long Yuan ◽  
Shuang Mei Chang
Keyword(s):  
Numerical Simulation ◽  
Limit Equilibrium ◽  
Simulation Method ◽  
Work Conditions ◽  
Sliding Surface ◽  
Tunnel Engineering ◽  
Safety Factors ◽  
Easy Method ◽  
Stability Of Slope ◽  
The Stability

The stability of two profile, with No.Ⅲ landslide of Daping landslide group near the tunnel engineering of Sunjiaya, was respectively discussed using limit equilibrium and numerical simulation method at operation one (gravity) and two (gravity+rainstorm) in this paper. The dangerous sliding surface and corresponding safety factors was calculated by limit equilibrium method, to upper and lower parts of No.Ⅲ landslide in two different work conditions. The model of two calculation profiles was established and the dangerous sliding surface and corresponding safety factors was simulated by finite difference software of FLAC3D for upper and lower parts of No.Ⅲ landslide at two operations. Compared with limit equilibrium, FLAC3D is a simple and easy method to analyze the stability of slope.

scholarly journals Strength Characteristics and Slope Stability Analysis of Expansive Soil with Filled Fissures

2020 ◽  
Vol 10 (13) ◽  
pp. 4616 ◽  
Author(s):  
Zhangjun Dai ◽  
Jianhua Guo ◽  
Hongming Luo ◽  
Jian Li ◽  
Shanxiong Chen
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Modular Design ◽  
Expansive Soils ◽  
Expansive Soil ◽  
Triaxial Tests ◽  
Sliding Surface ◽  
Inclination Angles ◽  
North Water ◽  
The Stability

Fissured expansive soils were widely distributed in the South-to-North Water Transfer Project. Most of the fissures were filled with clay, which controlled the stability of the slope. With the method of layered filling—bevel cutting—refilling and a modular design idea, the sample with a filled fissure preparation device for triaxial test was designed. After setting the filled fissures of gray-green clay in the expansive soil, triaxial tests were carried out for the samples with no filled fissures and with filled fissures with inclination angles of 15°, 30°, and 45°. Then, considering the spatial distribution and the strength of the filled fissures in the slope, the stability analysis method for the expansive soil slope with filled fissures was proposed. The stability of a typical slope in Nanyang was analyzed. The results show that the c of expansive soil with filled fissures was about 12 to 15 kPa and the φ was 3° to 6°. Filled fissures had an attenuation effect on the strength of the expansive soil. The larger the inclination of filled fissures, the more significant the effect of soil strength attenuation. The fissured slope stability was controlled by the filled fissures. The sliding surface was affected by the vertical fissures on the top of the slope and the slow-inclined long-large fissures in the slope, and the shape of the sliding surface was a broken line, which was basically consistent with the actual landslide.

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