Dynamic Visualization System Of Rock Fracture Information Based On VR Technology And Applied Research

In this paper,roadway is taken as the research object.Firstly,photogrammetry technology was used to establish a 3D digital model,and a visual system was established based on VR technology to realize the information query of cracks and blocks.The research contents and achievements are as follows:(1)The camera is used to take high-definition photos from different angles of the roadway to obtain high-resolution images,and 3d digital modeling of the roadway is carried out.The semi-automatic identification method is used to identify and extract fissure trace.After certain processing,the tunnel and trace model are merged into Unity development platform for further development.(2)This paper uses Unity3 D as the development platform and C# language for system development.Role control technology is adopted to set three roaming modes,namely first person,third person and automatic roaming,which can clearly and smoothly display the roadway.The 3D map navigation technology is used to display the position of the characters in the scene.Collision detection technology is adopted to trigger event response and increase scene authenticity.(3)Based on the statistical analysis of the fracture trace length and occurrence parameters in the study area,a determination-stochastic 3D network model was established based on the Mote-Carlo method and the geometric relationship between the center of a circle and the radius was added as constraints.Based on the three-dimensional network model,topological theory was used to solve the intersection line and closed loop of the fracture,and then the block was searched and the control plane and volume of the block were analyzed statistically.The roughness coefficients of cracks were calculated by fractal dimension method.By generating several different 3D fracture network models,the block generation probability is calculated.The obtained fracture and block information lays a foundation for the further development of information query function in the system.(4)The roadway,crack and block models are superimposed,that is,after realizing block recognition and visualization,they are imported into the Unity3 D platform and superimposed with the roadway and crack models,and the crack trace information,crack disk information and block information are written into the C# file,finally realizing the information query of cracks and blocks.(5)Add scene transmission,object display,background music and other interactive functions to the system.Taking Unity3 D as the development platform,the system is optimized,tested and released,and an efficient and feasible dynamic visualization system of fracture information is established.This article is based on the features of VR technology,beishan test roadway,for example,to study dynamic visualization,display intuitive roadway scene at the same time,the real implementation of fissure and block information query and management,to carry out underground laboratory construction and subsequent during long-term operation of roadway surrounding rock crack information management and query demand provides an effective way.