基于Hough检测的节理岩体迹线信息快速识别方法与应用研究

Investigation of fast identification of joint traces information of rock mass based on Hough detection method and its application

工程岩体中结构面的存在直接影响其强度与变形特征及破坏模式,结构面分布信息调查和产状分析是开展工程岩体稳定性评价的基础。针对岩体光滑揭露面的节理分布,提出了一种基于Hough检测原理的节理岩体表面迹线信息快速识别方法。该方法主要通过图像边缘检测获得迹线图后进行自动识别迹线,实现了节理迹线的产状信息识别。研究结果表明,该方法能够有效地实现不同左/右倾、交叉直线图像的信息识别;以离散节理网络模型和工程岩体实例为对象进行算法分析对比,有效地识别出主要节理迹线的产状分布信息,探讨了Hough检测关键参数k值的敏感性,验证了Hough检测方法在节理岩体迹线信息识别的可行性。提出的Hough检测方法能够为岩体节理迹线识别和信息分析提供一种新的工程应用方法。

The discontinuities in rock mass could directly affect the strength,deformation and fracture patterns.Investigation of the distribution information and the orientation of discontinuities in jointed rock mass is the fundamental part for rock engineering.This paper proposed a fast identification and analysis method of joint traces information based on the Hough detection method.The orientation information of the joint traces could be automatically recognized and analyzed based on the image edge detection of rock mass image.The research results show the feasibility of the proposed method when detecting the left-inclined,right-inclined lines and crossing straight lines.Extraction of the joint traces of discrete fracture network model and in-situ case were analyzed and compared.The information of orientation and dip angle of the joint traces was effectively identified.The feasibility of the proposed method in identifying the joint traces was discussed by analyzing the sensibility of the identifying parameter of k.The proposed Hough detection method could provide a novel application method for the identification of joint traces information of rock mass.