A characterization method for the full-field evolution of a surrounding rock stress field and an activation mechanism of adjacent faults, comprising: according to real mine fault features, determining the thickness and position of each rock layer and fault according to the principle of the ratio of similarity, generating a mine fault digital model, and printing by using a multi-material high-precision layered three-dimensional molding 3D printer so as to obtain a mine fault structure test model; applying a biaxial load to the test model by using a dual-axis synchronous plane loading test machine to simulate an ground stress state during the mining process of coal seams; cutting along the direction of an excavation work face by using a cutting test machine to simulate the mining process of the coal seams of a mine, and acquiring isoclinic line and isochromatic line fringe pictures of the test model by means of a dynamic photoelastic testing system in combination with a phase shift method; and calculating the stress field by means of a processor from the isoclinic line and isochromatic line fringe pictures. The method is able to accurately and quickly quantitatively characterize the full-field evolution of the surrounding rock stress field and the distribution law of the full-field stress distribution and evolution of adjacent faults during the mining process of the coal seams.
展开▼
