Stability analysis of a high steep open pit mine slope under freeze-thaw cycle conditions in alpine region
In order to analyze the stability and deformation damage characteristics of the designed slope of an open-pit mine in the western alpine and high-altitude area under the influence of freezing and thawing,the article selects a typical computational profile with reference to the design situation,and determines the computational mechanical parameters of the rock body based on the results of the testing of the strength of rock body to freezing and thawing and the results of the conventional mechanical calculations.After that,the finite difference program was used to quantitatively analyze the mechanical response characteristics of slopes under self-weight,rock excava-tion,blasting and seismic loading,and combined with the strength reduction algorithm,the corresponding potential sliding surface morphology and safety coefficients were obtained,which showed that the safety coefficients of the studied slopes were as follows:self-weight+groundwater-1.465 The results show that the safety coefficients of the studied slopes are:self-weight+groundwater-1.465,self-weight+groundwater+blasting vibration-1.402,self-weight+groundwater+earthquake-1.363,which meet the requirements of the current specification.The results of this research provide a reference for the mechanical properties of freeze-thawed rock formations in alpine regions and the slope stability research of open pit coal mines affected by freeze-thaw.
slope stabilityfreeze-thaw cyclesstrength reduction methodfactor of safety
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