关键词: 排土场, 三维建模, 稳定性, 安全系数, Kriging插值, 露天矿

Abstract: The plane strain analysis method was widely adopted in evaluation of dump slope stability. It is embarrassed that, dumps sometimes destroyed but the safety factor was go over the allowable value. Regardless of those issues had been mentioned frequently, such as mechanical parameters, constitutive model and so on, the spatial clamp effect of convex and divergent effect of concave and slide-body-end effect are also play vital roles in analysis of slope stability. For those reasons, proceed from conditions of plane elevation data, geological section, drilling data and others, Kriging interpolation method, which can obtained a smooth effect of interpolation, was adopted, and then the three-dimensional(3D) geological model of dump was built. Then an interface program, wrote by FISH, was used to import the 3D-model into FLAC3D to discretization and calculation. In this way, the issues mentioned above can be figure out efficiently. Trinity function include 3D geological modeling, model visualization, geotechnical analysis was achieved in a simple and highly efficient way. An example of Jianshan seventh dump of Lanjian Iron Mine, Pangang Group co. Ltd. of China, was concerned by previous mean, 3D stress-strain analysis was carried out, 3D global safety factor was also calculated by 3D strength reduction method. It turned out that the results was accordant to the field investigation and plane strain analysis conclusion. Results calculated by the 3D geological model cannot be affected by dump spatial effect and slide-body-end effect, the general stress-strain pattern, which obtained from the method, can be instructive and meaningful to production management for open-mine dumps.

Key words: waste dump, 3D geological modeling, stability, safety factor, Kriging interpolation, open-mine