Abstract: Jinchuan No. 2 mining area lies in a complex initial stress field, which is composed of gravity field and bidirectional construction stress field. ANSYS software provides a detailed simulation process for its complex initial stress field and a complex 3D simulation method for initial stress field which keeps a stress gradient, thus solving the problem which has puzzled the analyst engineers for a long time. This simulation method is of important reference value to 3D stress field treatment in geotechnical engineering.

Key words: Initial stress field, Stress gradient, Boundary conditions, ANSYS