Finite element analysis of steep excavation slope failure by CFS theory

Zhang, Huai; Zhu, Bo; Shi, Yaolin

doi:10.1007/s11589-012-0844-4

Cited by 6 publications

(3 citation statements)

References 23 publications

(19 reference statements)

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“…Coupled with Top Unloading. A three-dimensional finite element model was established for the current status of slope excavation after unloading at the top of the eastern mining area [55]. The time-history analysis results of the high slope three-dimensional model under the action of blasting vibration after unloading are shown in Figure 15.…”

Section: Stability Of Eastern Mining Area After Blasting Vibrationmentioning

confidence: 99%

Study on Three-Dimensional Dynamic Stability of Open-Pit High Slope under Blasting Vibration

et al. 2022

Lithosphere

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The propagation process of blasting vibration has always been a difficult problem affecting the stability of high slopes in open-pit mines. Taking the Jianshan Phosphorus Mine as the research background, combined with engineering geological investigation, field blasting test, blasting vibration monitoring, numerical simulation technology, and theoretical analysis, the three-dimensional dynamic stability of the adjacent high slope after blasting vibration was systematically studied. In our study, a small-diameter buffer shock-absorbing blasting technology near the slope was proposed, which greatly improved the production efficiency. Through regression analysis of a large amount of vibration test data, the law of blasting vibration propagation in Jianshan stope and Haifeng stope was obtained. In addition, by establishing four three-dimensional geomechanical numerical models, the slope’s own frequency, damping characteristics, and dynamic response acceleration distribution after detonation were studied, respectively. On the other hand, under the action of Ei Centro wave with 8-degree seismic intensity, the maximum total acceleration and maximum total displacement of the slope were calculated and analyzed. Both the explosion unloading of the 8-degree earthquake and the Ei Centro wave simulation results showed that the high slope near the Jianshan Phosphorus Mine was generally in a stable state. Thus, this study can provide technical support and theoretical guidance for mine blasting.

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Section: Stability Of Eastern Mining Area After Blasting Vibrationmentioning

confidence: 99%

Study on Three-Dimensional Dynamic Stability of Open-Pit High Slope under Blasting Vibration

et al. 2022

Lithosphere

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“…Also, because of a lower cost and high accuracy, the numerical simulation has become a common prediction method in engineering analysis project. The fast development of computer technique makes many scholars use the Finite Difference Method (FDM) [29][30][31][32], Finite Element Method (FEM) [33][34][35] and Discrete Element Method (DEM) [36] to predict slope stability problems. Although, a great deal of research has been done by scholars all over the world, because of the defective equivalent accuracy and elusory mechanical path, the traditional analysis methods have some inevitable errors.…”

Section: Introductionmentioning

confidence: 99%

Adopting method of key block and energy distribution to predict the slope stability under blasting

Li¹,

Chen²,

Li³

2017

J. vibroeng.

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At present, an important slope stability analysis method consists in the evaluation of the bearing capacity of key block, which is located between the joints and fissures in rock mass, and plays the decisive role on the slope stability. Because of the defective equivalent accuracy and elusory mechanical path, the traditional analysis methods have some inevitable errors. However, the energy theory can avoid the above defects easily, in this paper, the analytical input energies are potential energy and blasting vibration energy, and the consumed energies are fractured dissipative energy, friction dissipative energy and kinetic energy of instability. In order to eliminate the size effect problem, it is necessary to emphasize each part of energy expression as the energy density form. And the first four items would be confirmed by different theories and tests, so that the instability kinetic energy could be evaluated by the energy conservation law, and then the instability velocity could be calculated to predict the instability grade of slope.

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“…Although, many scholars have done huge efforts on the excavation and slope stability all the world. Lilly and Li (2000) estimated the excavation reliability by using the displacement modeling [4]; Sheng et.al., (2002) estimated the excavation disturbed zone in the permanent shiplock slopes [5]; Li et.al., (2007) used a Face-to-Face discrete element method to analyze the critical excavation depth for a jointed rock slope [6]; Cheng et.al., (2012) adopted the CFS theory to analyze the steep excavation slope failure [7]; Guo and Cheng (2013) had a consideration on group excavation engineering [8]; Guo et.al., (2013) did the research on the deformation stability of soft rock slope under excavation based on FLAC3D [9]; Hsieh et.al., (2013) used the three-dimensional numerical analysis of deep excavations with cross walls [10]; Wang et.al., (2014) did the research on the loess landslide induced by excavation and rainfall [11]. For the deep and steep rock slope in the metal mine, as the increasing of depth, the geostress are becoming huge and complex, which will generate a remarkable impact on the slope stability.…”

Section: Introductionmentioning

confidence: 99%

Based on the Geostress to Research Slope Stability in the Deep Open Pit

Chen

2014

AMR

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Further excavation is extraordinary significant to the sustainable development of mine. For the rock slope, three-dimensional geostress in the deep mining area are presented complex and high, which were caused by previous excavation. Also, it is important to obtain the accurate geostress in mining area, which is the necessary precondition for determining the remaining ore mining scheme and the slope stability. In this paper, based on the in-situ geostress monitoring date, a 3D numerical model alongside the physical dimensions was built in finite element software FLAC3D, to accept the constitutive parameter and monitoring data, to predict the 3D stress and displacement distributions and detail failure information, to estimate stability of mining area.

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Finite element analysis of steep excavation slope failure by CFS theory

Cited by 6 publications

References 23 publications

Study on Three-Dimensional Dynamic Stability of Open-Pit High Slope under Blasting Vibration

Study on Three-Dimensional Dynamic Stability of Open-Pit High Slope under Blasting Vibration

Adopting method of key block and energy distribution to predict the slope stability under blasting

Based on the Geostress to Research Slope Stability in the Deep Open Pit

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