FAST MODELING METHOD OF MULTI-ATTRIBUTE 3D GEOLOGICAL MODEL AND APPLICATION IN HIGH GEOSTRESS TUNNEL

In order to raise the efficiency of 3D geological modeling method on complex geological conditions, based on Indicator Kriging, this paper realized the fast construction of 3D geological model under complex geological conditions. Through the 3D geological model, the lithology distribution in space can be accurately characterized. By secondary development, the integration of 3D geological model and numerical model under complex geological conditions is realized. Taking the prediction of rockburst disaster in tunnel with high geostress and surrounding rock classification modification as examples, the attribute analysis of 3D geological model is carried out. Finally, combined with the geostress attribute model and the stress distribution of tunnel surrounding rock obtained from excavation simulation, the grade and area of rock burst in a tunnel are analyzed. The results show that medium to strong rockburst may occur when the tunnel crosses through hard rock.