Imaging method of ground penetrating radar for rock fracture detection based on improved back projection algorithm

被引：0
|
作者：
Li Y. [1 ]
Li S.-C. [1 ]
Liu B. [1 ]
Xu L. [1 ]
Zhang F.-K. [1 ]
Nie L.-C. [1 ]
机构：
[1] Geotechnical and Structural Engineering Research Center, Shandong University, Ji'nan
来源：
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2016年 / 38卷 / 08期
关键词：
Back projection algorithm; Forward modeling; Ground penetrating radar; Imaging method; Improved back projection algorithm; Rock fracture;
D O I：
10.11779/CJGE201608009
中图分类号：
学科分类号：
摘要：
The ground penetrating radar (GPR) can be used to identify and detect the rock fractures in advance, and it's very important for the understanding of rock structures and the prevention of rock disasters. Due to the multiple reflections, diffractions and other issues, the identification and interpretation of the results for GPR detection with more complex fracture networks is difficult. The back projection (BP) algorithm can be used to obtain high-resolution radar imaging, but the serious noise jamming of the traditional BP algorithm reduces the effect and resolution for GPR imaging. Therefore, an improved BP algorithm that uses correlation among different tracks of the radar response of the point to be imaged is proposed. The improved BP algorithm uses 2 times of fast correlation operations to increase the inhibition of interference in other points, and uses electromagnetic wave attenuation compensation parameter to enhance the effect of radar imaging. For several typical rock fracture networks, GPR forward modeling and imaging simulation are launched based on improved BP algorithm, while the physical model tests are verified, and it is found that the improved BP algorithm can obtain the imaging of the location and shape of the fracture networks, and has stronger interference suppression effects, than the traditional BP algorithm. © 2016, Editorial Office of Chinese Journal of Geotechnical Engineering. All right reserved.
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页码：1425 / 1433
页数：8
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