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《Rock and Soil Mechanics》 2019-11
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Intelligent measurement on geometric information of rock discontinuities based on borehole image

GE Yun-feng;ZHONG Peng;TANG Hui-ming;ZHAO Bin-bin;WANG Liang-qing;XIA Ding;QIU Ya-shi;LI Peng-fei;ZHANG Li;WEN Lian;CAO Tian-ci;Faculty of Engineering, China University of Geosciences Wuhan;China Electric Power Research Institute Co.Ltd.;Powerchina Guiyang Engineering Corporation Limited;  
To extract accurately rock discontinuities from the borehole images and measure automatically the corresponding geometric information, an intelligent recognition method based on the edge detection algorithm was proposed in this study. Firstly, the feature parameters related to gray level co-occurrence matrix were calculated to locate the rock discontinuities areas in the long borehole images, and Canny edge detector was employed to identify the rock discontinuities edge in these located rock discontinuities areas. Secondly the upper and lower edges of rock discontinuities were extracted through the edge-edge connection and appropriate threshold selection. Thirdly, the rock discontinuities edge trigonometric function was fitted to obtain the sinusoidal curve of the upper and lower edges of the rock discontinuities, and several geometric parameters of the rock discontinuities, such as the dip direction, dip angle and aperture were computed through spatial geometric theory. In the case study, images of borehole wall were recorded in two boreholes in the dam site of Rumei hydropower station, and the geometric data of rock discontinuities derived from the proposed method matched the data obtained from other existing approaches, verifying the feasibility of this method.
【Fund】: 国家重点研发计划(No.2018YFC1507200);; 中央高校基本科研业务费专项资金资助项目(No.007-G1323521840);; 中国地质大学(武汉)实验技术研究项目(No.SJ-201812)~~
【CateGory Index】: P624
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