Research on 3D visualization of geological boreholes based on photo-acoustic combination measurement
WANG Jinchao1，WANG Chuanying1，DU Qi2，LUO Peng2，HUANG Junfeng3
(1. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；2. Geological Disaster Emergency Center，Hubei Provincial Department of Natural Resources，Wuhan，Hubei 430064，China；3. Emergency Surveying and Mapping Support Center，Hubei Provincial
Department of Natural Resources，Wuhan，Hubei 430064，China)
Abstract：In view of the limitations of borehole optical image information in reflecting the borehole contour characteristics，and at the same time，in order to enrich the source of borehole texture and geometric contour information，this paper proposes a 3D visualization method of geological boreholes based on photo-acoustic combination measurement，which visually presents the 3D morphological characteristics of the borehole wall by integrating the circumferential and axial texture images and scanning contour information of the borehole. The method can solve a series of problems，such as borehole wall optical image reconstruction，contour curve reconstruction，3D modeling and data visualization optimization based on the synchronous fusion of optical image information and acoustic scanning data. Firstly，based on the principle of optical image and sound scanning synchronous measurement technology，which can realize the borehole fine measurement，a method of borehole wall optical image and contour curve reconstruction is proposed，which can realize the stitching of borehole wall texture images at different depths and the modeling of borehole wall 3D contour. Then，based on the borehole wall surface texture and geometric contour，the mapping relationship and fusion mechanism between the photo-acoustic combined measurement data are established，and a 3D visualization system of geological boreholes based on photo-acoustic combined measurement is formed. Finally，combined with a specific case，the 3D visualization and morphological feature analysis of geological borehole are completed，and the feasibility and superiority of this method are verified. The research shows that the borehole data obtained by the combined measurement of optical image and sound scanning is more abundant，and the 3D visualization model of geological borehole can effectively improve the accuracy and objectivity interpretation of geological borehole wall data，which can provide a new idea and method for the fine detection and research of geological borehole rock mass structure.
汪进超1，王川婴1，杜 琦2，罗 鹏2，黄俊峰3. 基于光声组合测量的地质钻孔三维可视化研究[J]. 岩石力学与工程学报, 2023, 42(3): 649-660.
WANG Jinchao1，WANG Chuanying1，DU Qi2，LUO Peng2，HUANG Junfeng3. Research on 3D visualization of geological boreholes based on photo-acoustic combination measurement. , 2023, 42(3): 649-660.
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2023, Vol. 42 
