The influence of number of grid points and radius increments in determining safety factor and estimated sliding volume on three-dimensional slope stability analysis

2nd Mineral Processing and Technology International Conference

工业技术（总论）;矿业工程

Azizi, M.A.^1 ; Marwanza, I.^1 ; Anugrahadi, A.^1 ; Faradiba, A.A.^1 ; Hartanti, N.A.^1

Mining Engineering Department, FTKE Universitas Trisakti, Jl. Kyai Tapa No. 1, Tomang, Grogol Petamburan, West Jakarta, DKI Jakarta

11440, Indonesia^1

关键词: Critical slip surface;    Geometric complexity;    Grid search;    Limit equilibrium methods;    Longitudinal direction;    Number of Grids;    Slip surfaces;    Three-dimensional slope stability;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/478/1/012041/pdf
DOI  :  10.1088/1757-899X/478/1/012041

学科分类：工业工程学

来源: IOP

【 摘 要 】

The existence of geometric complexity in the longitudinal direction makes 3D Limit Equilibrium Method (LEM) able to depict conditions in the field well and obtain Safety Factor (SF) that is more representative than the 2D limit equilibrium method. Safety factor calculations are not only influenced by the Direction of Sliding (DoS), but also by the location of the slip surface. Therefore, determining the location of the slip surface is important in the 3D limit equilibrium method. In this study, the method used for generating slip surfaces is a grid search where variations are made on the number of grid points and the radius increments to determine the effect of these two variables on the determination of safety factor and estimated sliding volume. Based on the results of the study, it can be stated that the greater the number of grid points and the radius increments, the estimated sliding volume will be more precise, while the calculation of safety factor is only affected by the number of grid points where the greater the number of grid points, the search of critical slip surface will be more accurate.