Stability Analysis of Rock Structure in Large Slopes and Open-Pit Mine: Numerical and Experimental Fault Modeling

Azarfar, Babak; Ahmadvand, Seyedsaeid; Sattarvand, Javad; Abbasi, Behrooz

doi:10.1007/s00603-019-01915-4

Cited by 40 publications

(10 citation statements)

References 25 publications

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“…The shell structural unit and cable structural unit were adopted in the initial lining and the anchor, respectively adopts, the locking foot anchor pipe adopts pile structural unit, and the excavation process is realized by giving empty unit (null). [11][12] According to the ground investigation report combined with relevant specifications, the main mechanical parameters were obtained as shown in Table 1.…”

Section: Building the Modelmentioning

confidence: 99%

Analysis of surrounding rock deformation in large section tunnel with different control technology crossing fault zone

2022

AJAGE

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Aiming at solving the deformation of surrounding rockmass when large-section tunnels pass through faults, the construction method of No. 2 Cajianweishan tunnel of Shugang Passage in Haicang is optimized, and the original design method and optimization method for the construction process are simulated numerically by FLAC3D. The deformation of surrounding rock caused by construction under above two methods during tunnel excavation is compared and analyzed. The results show that the deformation is almost equal in above two construction methods when crossing the fault, but the optimized construction method can provide enough working space when excavating the No.2 and No.4 heading and effectively avoid the problem of pass of construction vehicles due to the setting of the inverted arch trestle. Considering the construction schedule, it is more advantageous to adopt the optimized construction method in the fault zone. The study can provide a reference for the tunnel engineering with similar geological conditions in the future.

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Section: Building the Modelmentioning

confidence: 99%

Analysis of surrounding rock deformation in large section tunnel with different control technology crossing fault zone

2022

AJAGE

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“…The quadrilateral element was used to generate the grid, and considering the actual differences in the fragmentation and water-richness of different units of slope rock mass, the grid element was not equidistant, but the grid of IV and V-level units was encrypted to improve the transmission efficiency of node parameters, and the encryption ratio was 1:1.3 [8]. Assuming that the rock mass was a homogeneous elastic-plastic body, the Mohr-Coulomb stress criterion was obeyed [9]. Without setting a fixed number of iterations, the software calculates itself according to the principle that the stress distribution reaches equilibrium [10].…”

Section: Grid Model Establishmentmentioning

confidence: 99%

Study on Finite Element Numerical Simulation of Rock Slope Based on Ground Penetrating Radar Detection

2021

IJFET

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Weathering degree of natural slope and its mechanical parameters have significant spatio-temporal variability. At present, the method of determining the mechanical parameters according to the suggestions of the specification ignores this phenomenon. In order to improve the accuracy of finite element numerical simulation results, a method for obtaining rock mass mechanical parameters based on ground penetrating radar (GPR) detection was proposed. Based on a rock slope of Xianyang international airport in Shaanxi province, the degree of fracture and water-rich inside the slope were detected by GPR, and the slope was divided into several units with different levels. Then, the mechanical parameters such as elastic modulus, Poisson's ratio and cohesion force of different units were obtained according to the specification. Fatherly, the finite element numerical simulation software MIDAS-GTS was used to establish the grid model of the slope, and the recommended values provided by the specification were used to calculate the sliding displacement of the slope. Compared with the field displacement monitoring data, the results showed that the numerical simulation values were closer to the monitoring values, indicating that the mechanical parameters obtained by this method were more consistent with the actual value of the rock mass.

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“…In order to ensure that open pit mining can be carried out safely and smoothly, the prediction and analysis of the stability of the open slope of the mining site is becoming more and more important. With the rapid development of computer science, numerical simulation analysis has become the main tool to study these kinds of engineering problems [5][6][7][8][9][10][11]. Software that fuses strength theory and numerical simulation can quickly and effectively simulate changes in slope stresses.…”

Section: Introductionmentioning

confidence: 99%

Mine Slope Stability Based on Fusion Technology of InSAR Monitoring and Numerical Simulation

Yuan

et al. 2022

Scientific Programming

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In this paper, the slope of the open pit of Dahongshan iron ore mine in Yunnan is taken as the research object, the safety coefficient and settlement values of the slope under natural and rainfall conditions are derived by the finite element software Midas/GTS, and the surface settlement versus time is produced by fusing the InSAR monitoring results of the study area for a whole year to judge the stability of the open pit slope. The results show that the settlement and deformation areas shown by numerical simulation and InSAR monitoring results are consistent; the comparison between InSAR monitoring results and rainfall intensity shows that the cumulative value of slope settlement has a high correlation with heavy rainfall. The safety coefficients of the slopes of the open pit under natural conditions and rainfall conditions are 1.50 and 1.21, the cumulative value of settlement in InSAR monitoring data for one year is 18.4 mm, and no obvious large deformation area is found. The use of numerical simulation combined with InSAR monitoring can realize the analysis of the stability of the slope of the open pit mine.

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Stability Analysis of Rock Structure in Large Slopes and Open-Pit Mine: Numerical and Experimental Fault Modeling

Cited by 40 publications

References 25 publications

Analysis of surrounding rock deformation in large section tunnel with different control technology crossing fault zone

Analysis of surrounding rock deformation in large section tunnel with different control technology crossing fault zone

Study on Finite Element Numerical Simulation of Rock Slope Based on Ground Penetrating Radar Detection

Mine Slope Stability Based on Fusion Technology of InSAR Monitoring and Numerical Simulation

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