Inversion Analysis and Application of Initial Geostress Field Based on Finite Element Analysis and Multivariate Regression

Abstract

Based on the engineering geological conditions and measured geostress data of the Linglong Gold Mine, this paper uses the finite element and multivariate regression analysis method to carry out the regression inversion analysis of the initial geostress field in the specific region of the mine. Firstly, the finite element model of the study area was established using the aerial photography data, and the stress distribution of various setting conditions was obtained by the three-dimensional finite element analysis method. Then, using the multivariate regression analysis method with iterative refinement, the optimal regression coefficient is obtained, and the initial three-dimensional regression analysis model of geostress field is determined. Finally, according to the results of inversion analysis, the influencing factors on the initial ground stress distribution are discussed. Through the comparison be-tween computed and measured geostress values of measuring points, it can be determined that the two values are identical in magnitude and close in direction, indicating that the measured geostress field obtained by regression is reasonable, and can reflect the initial measured geostress field in the designated area of the gold mine more accurately, which provides a useful tool for the prediction and protection of rock burst disaster during the gold mine excavation.