›› 2017, Vol. 38 ›› Issue (10): 3074-3080.doi: 10.16285/j.rsm.2017.10.038

• Testing Technology • Previous Articles    

A new method for extraction of parameters of structural surface in borehole images

WANG Jin-chao1, 2, WANG Chuan-ying1, HU Sheng1, HAN Zeng-qiang1, WANG Yi-teng1, 2   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-07-25 Online:2017-10-10 Published:2018-06-05

Abstract: This study aims to improve the automation and accuracy of extracting parameters of rock mass structural planes. By considering rock mass characteristics of the structural plane in borehole images, a new method was developed for the pre-processing of structural plane image and the extraction of structural plane parameter. First, the noise in borehole images was removed with an adaptive median filtering method. An improved variance method was also proposed by comparing the gradient operator method and the maximum interclass variance method, which is more suitable for the actual borehole image segmentation. Then, a Canny operator was used to detect the edge of segmented images. Finally, the sine curve of the structural plane was obtained by the polynomial curve fitting, and thus the structural plane parameters including dip, dip angle and width were calculated. The comparison of results obtained by the proposed extraction method and the traditional manual recognition shows that the proposed method is more accurate. Therefore, it is demostrated that the proposed method is feasible and accurate, and its extraction efficiency is higher than the traditional manual method.

Key words: borehole camera, borehole image, structural plane extraction, structural plane attitude, structural surface width

CLC Number: 

  • TU 452

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