Modeling and Inversion of Complex 3D Geologic Field Stress and Its Application in Rockburst Evaluation

Abstract

Geostress is the basis for mining and geotechnical engineering designs, and dynamic disaster preventions. And the geostress inversion is a mathematical procedure that to calculate and extend the geostress field distribution base on a handful of measurement results. In order to make use of fine distribution characteristics of geostress field to evaluate the rock burst risk in a target area, this study carried out corresponding research contents for a deep mine in Shandong Province: (1) Conducted site measurements of geostress by means of hollow inclusion method; (2) Developed a complex 3D geological model based on multi-software to inverse and reconstruct the complex geostress fields coupled with multiple linear regression (MLR); (3) Compared the microseismic monitoring results with 3D geological model nephogram and provide theoretical basis for rock burst risk evaluation and regionalization in target area. Results showed that the reconstitution of 3D geological model gave well agreement with experimental results. The geostress evaluated results of 3D model of were consistent with the actual rock burst risk situation. The rapid constructed 3D geological model construction was expected to provide a certain reference meanings for geostress analysis to similar mines.