Formation mechanism, deformation characteristics and stability analysis of Wujiang landslide near Centianhe reservoir dam

2016 ◽  
Vol 211 ◽  
pp. 27-38 ◽  
Author(s):  
Guanhua Sun ◽  
Yaoying Huang ◽  
Chunguang Li ◽  
Hong Zheng
Keyword(s):  
Stability Analysis ◽  
Formation Mechanism ◽  
Deformation Characteristics

scholarly journals The Formation Mechanism of Surface Landslide Disasters in the Mining Area under Different Slope Angles

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Chi Mu ◽  
Xueyi Yu ◽  
Bingchao Zhao ◽  
Dongdong Zhang ◽  
Xuwei Mao ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Formation Mechanism ◽  
Slope Angle ◽  
Mining Area ◽  
Rock Stratum ◽  
Effective Prevention ◽  
Surface Movement ◽  
Working Face ◽  
Geological Conditions ◽  
Movement And Deformation

Slope stability analysis is important for the safe mining of mineral resources. The collapse of goafs in loess gullies can lead to natural disasters such as surface landslides. In this context, this study analyzes monitoring data obtained from surface observation in the Shendong mining area of the Hanjiawan coal mine based on the geological conditions therein. The monitoring results show that the working face experiences a starting period, an active period, and a declining period, from the start of mining to the end of the working face. At the initial mining stage, there is no evident surface movement or deformation in the mining area. When the advance distance of the 12106 working face is between 13 m and 109 m, the surface movement and deformation vary significantly, and the maximum subsidence reaches 1963 mm, which is enough to cause landslides. We select the physical and mechanical parameters of the rock and soil in the mine and then simulate the formation mechanism of surface landslides under different slope angles of the mining area using FLAC3D software. Because of the collapse of the mined-out area, the overlying strata structure is destroyed, the subsidence basin is shifted to the center as a whole, and the slope mass is subjected to tensile and compression deformation, resulting in plastic damage, which develops downward along the crack and leads to a collapse because of the discontinuous movement and deformation of the surface; moreover, step-type ground fissures are produced. The results also show that when the slope angle is greater than 60°, the displacement of the slope mass is not uniform, and the rock stratum in a position with large displacement loses its support, leading to landslides; when the slope angle is less than 30°, the bedrock surface forms a sliding surface and develops to the surface, thus decreasing the possibility of landslides. Based on the stability analysis of the collapsed slope in the goaf of the loess gully, a scientific basis is provided for the effective prevention and control of geological disasters in the Shendong mining area.

scholarly journals Stability Analysis of the Shiliushubao Landslide Based on Deformation Characteristics and External Trigger Factors in the Three Gorges Reservoir

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Guilin Luo ◽  
Guangming Ren ◽  
Xiaojun Bao ◽  
Xili Yang ◽  
Teng Liu
Keyword(s):  
Stability Analysis ◽  
Three Gorges Reservoir ◽  
Seasonal Fluctuation ◽  
Deformation Characteristics ◽  
Three Gorges ◽  
Trigger Factors ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Landslide Mass ◽  
The Stability

There exists the problem of landslide reactivation due to the seasonal fluctuation of rainfall and reservoir water level annually. Based on a large number of GPS monitoring data of the landslide mass after impoundment of the Three Gorges Reservoir in Shiliushubao landslide area, the relationship between the external trigger factors and slope stability could be obtained. A finite element calculation model has been established for the stability analysis of the Shiliushubao landslide after impoundment from January 2004 to October 2009. Through the deformation characteristics of the landslide, it is shown that the landslide exhibited a stepwise pattern on the whole, which developed faster after impoundment and slowed down in rainy seasons. The trend of the curve kept roughly opposite to the fluctuation of the safety factor. It suggested that the stability of the landslide mass was closely related to the seasonal fluctuation of the rainfall and the reservoir level, and the landslide deposits demonstrated to be reactive with them. The subject provides a certain reference value on the landslide stability analysis and the risk assessment within a similar engineering geological condition.

Slope Deformation Characteristics and Formation Mechanism

2016 ◽  
pp. 143-162
Author(s):  
Yang Changwei ◽  
Zhang Jingyu ◽  
Lian Jing ◽  
Yu Wenying ◽  
Zhang Jianjing
Keyword(s):  
Formation Mechanism ◽  
Slope Deformation ◽  
Deformation Characteristics

scholarly journals Formation mechanism and stability analysis of the DR landslide in national road 534 of Datian, Sanming, Fujian Province, China

2021 ◽  
Vol 12 (1) ◽  
pp. 3317-3345
Author(s):  
Chen Xiong ◽  
Fangpeng Cui ◽  
Jifeng Liu ◽  
Ning Li ◽  
Rongtao Jie ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Formation Mechanism ◽  
Fujian Province ◽  
National Road

Formation mechanism and stability analysis of the Houba expansive soil landslide

2013 ◽  
Vol 161 ◽  
pp. 34-43 ◽  
Author(s):  
Tian-shun Hou ◽  
Guang-li Xu ◽  
Yan-jun Shen ◽  
Zhang-zhong Wu ◽  
Ning-ning Zhang ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Formation Mechanism ◽  
Expansive Soil

scholarly journals Reactivation of a Huge, Deep-Seated, Ancient Landslide: Formation Mechanism, Deformation Characteristics, and Stability

Water ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1960
Author(s):  
Shilin Luo ◽  
Xiaoguang Jin ◽  
Da Huang ◽  
Xibin Kuang ◽  
Yixiang Song ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Formation Mechanism ◽  
Slip Surface ◽  
Surface Displacement ◽  
Periodic Variation ◽  
Formation Mechanisms ◽  
Deformation Characteristics ◽  
Reservoir Water ◽  
Fast Movement ◽  
Major Factors

In this study, an investigation on the formation mechanisms, deformation characteristics, and stability of the Outang landslide, composed by three independent blocks (O1, O2, and O3), is performed by integrating site surveys, multi-technique monitoring data, and numerical simulation. The results show that the formation mechanism for blocks O1 and O3 is slide-bulking, and is planar slide for block O2. These three blocks slide along the incompetent layers (ILs): IL1 is the slip surface of block O1 and O2, and IL3 is the slip surface of block O3. Furthermore, the west local fast movement zone might evolve into deep failure. The slope surface movement is step-like, characterized by the alternation of rapid displacement followed by imperceptible displacement over each hydrological year. The surface displacement velocities increased upslope. Based on the numerical simulation, both precipitation and reservoir water are believed as the major factors driving the slope behaviors, and the slope stability would be decreased gradually under the effect of the periodic variation of water level and seasonal precipitation infiltration. As a result of this study, some countermeasures of landslide and long-term monitoring are recommended.

Study on Deformation Characteristics of Dark-Brown Weathered Basalt Soil in Guizhou

2012 ◽  
Vol 170-173 ◽  
pp. 169-173
Author(s):  
Can Song Wang ◽  
Xue Wen Lei ◽  
Qing Shan Meng
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Water Content ◽  
Systematic Study ◽  
Dry Density ◽  
Deformation Characteristics ◽  
Slope Surface ◽  
Undisturbed Soil ◽  
Compression Coefficient ◽  
Consolidation Test

There is the dark-brown weathered basalt soil widely distributed along the slope surface of highway in Guizhou and its settlement is obvious under rainfall, which threatens the slope stability, while due to insufficient systematic study on its deformation characteristics, it hinders the highway’s construction in this region.The influence of its water content and dry density is studied by the standard consolidation test both of undisturbed soil and remolded soil under different water content and dry density conditions and its compression coefficient and rebound index are obtained, which provides a reference for slope stability analysis.

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