Study On Stability Of High Slope In Wuhu Lushan Gold Mine Based On Strength Reduction Method

With the rapid development of China's economy,more and more attention has been paid to the mining of mine resources,soil and water conservation,environmental protection and Slope Protection and other safety measures lag or even do not lead to more and more landslide disasters every year,It poses a grave threat to people's lives and property.In this paper,taking the classical slope as an example,the criterion of slope instability and the influencing factors of slope stability are discussed.Then,the two-dimensional and three-dimensional models are built on the engineering background of a high-risk Slope Section of the Lushan Gold Mine in Wuhu,Anhui Province,the failure mechanism and stability of slope under different working conditions are studied by using strength reduction method.The main research contents of this paper are as follows:(1)The physical and mechanical parameters(mainly internal friction angle and cohesion)of Rock and soil mass are determined by on-site investigation and collection of geological data and topographic features of the slope area.The mechanical basis and the constitutive model of the strength reduction method are analyzed to determine which constitutive model is used in the model calculation.(2)Through an example of slope calculation,this paper analyzes three kinds of instability criteria and the main factors affecting the slope stability of the FEM strength reduction factor method,compares and analyzes the advantages and disadvantages of the three kinds of instability criteria,and finally discusses the factors affecting the safety and stability of the slope.(3)The two-dimensional model of Slope Section in Lushan Gold Mine is established The seepage field and stability analysis under rainfall infiltration and the slope failure mechanism and stability analysis under earthquake action are carried out by using the strength reduction coefficient method of ABAQUS.(4)In this paper,a 3-d model of the Slope Section in Lushan Gold Mine is established,and the critical state of the slope of the 2-d model is compared with that of the 3-d model,and the influence of the direction and value combination of the seismic acceleration on the slope stability is discussed by comparing the Factor of safety of the2-d and 3-d model.Finally,the numerical simulation of the slope reinforced by anti-slide piles shows that the stability of the slope can be significantly improved after the anti-slide piles are reinforced.