Sensitivity Analysis of the Impact of Mining Water Hazard Factors on Natural Slope Stability
To further explore the sensitivity of water damage factors to slope stability,this paper orthogonal experi-ments and numerical simulations based on the actual background of the Daxing Lead Zinc Mine.Firstly,Pearson corre-lation analysis is used to evaluate the sensitivity of permeability coefficient K,porosity n,internal friction angle φ,and cohesion C to slope stability,and the corresponding correlation coefficients are calculated using Python;then,25 sets of orthogonal experiments were designed with 5 different levels of values for each factor.FLAC3D was used to simulate and calculate the slope safety factor under different factor combinations.Range and variance analysis were then used to further analyze the sensitivity of each factor to slope stability;compare two different experimental methods to verify the accuracy of water damage factors on slope stability.The experimental results show that Pearson correlation analysis is consistent with the range and variance analysis results under orthogonal experimental design,and the overall sensitivity ranking is internal friction angle φ>cohesion C>permeability coefficient K=porosity n.
mine water hazard factorsslope stabilityorthogonal experimental designPearson correlationsen-sitivity analysis
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