Study on sand particles creep model and open pit mine landslide mechanism caused by sand fatigue liquefaction

The sand particles in the sand - rock composite slope of the open pit mine occurs creep deformation and fatigue liquefaction under the action of vehicle load vibration and hydraulic gradient, which causes landslide geological disasters and it destroys the surface environment. To reveal the mechanism...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2017-06, Vol.69 (1), p.12021
Main Authors: Du, Dong-Ning, Wang, Lai-Gui, Zhang, Xiang-Dong, Zhang, Shu-Kun
Format: Article
Language:English
Subjects:
Creep strength
Deformation
Geological hazards
Hydraulic gradient
Hydraulic loading
Landslides
Liquefaction
Materials fatigue
Mathematical models
Open pit mining
Parameter identification
Particulate composites
Plastic properties
Plasticity
Rotation
Sand
Sand & gravel
Sandy soils
Soil mechanics
Vibration
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Summary:The sand particles in the sand - rock composite slope of the open pit mine occurs creep deformation and fatigue liquefaction under the action of vehicle load vibration and hydraulic gradient, which causes landslide geological disasters and it destroys the surface environment. To reveal the mechanism, a mechanics model based on the model considering the soil structural change with a new "plastic hinge" element is developed, to improve its constitutive and creep curve equations. Data from sand creep experiments are used to identify the parameters in the model and to validate the model. The results show that the mechanical model can describe the rotation progress between the sand particles, disclose the negative acceleration creep deformation stage during the third phase, and require fewer parameters while maintaining accuracy. It provides a new creep model considering rotation to analyze sand creep mechanism, which provides a theoretical basis for revealing the open pit mine landslide mechanism induced by creep deformation and fatigue liquefaction of sandy soil.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/69/1/012021