Tunnel surrounding rock information extraction method based on digital image

Abstract

The invention relates to the technical field of geotechnical engineering, and discloses a tunnel surrounding rock information extraction method based on a digital image, which comprises the following steps: S1, acquiring an original digital image of surrounding rock of a tunnel bare hole section; s2, preprocessing the original digital image to obtain a preprocessed digital image; s3, extracting geological information of the tunnel face from the preprocessed digital image through a digital image processing method based on a man-machine interaction interpretation mode; s4, extracting rock mass fracture information from the preprocessed digital image by adopting an image interpretation method; s5, extracting rock mass joint information from the preprocessed digital image by using a convolutional artificial neural network classifier; and S6, extracting the rock mass quality index and the average spacing of the rock mass structural surfaces from the preprocessed digital image by analyzing the boundary lines of the structural surfaces. According to the invention, the technical problem in the prior art that the result of carrying out feature analysis and judgment on the tunnel surrounding rock by technicians through on-site observation, recording and sketch drawing is not accurate enough can be solved.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a method for extracting tunnel surrounding rock information based on digital images. Background technique [0002] In recent years, tunnels have become one of the main choices of global transportation due to their characteristics of saving land and short lines. Therefore, the construction of tunnel projects is becoming more and more frequent, especially in China. However, as more and more tunnels are built and the scale is getting bigger and bigger, the problems encountered are also increasing day by day. At present, tunnel safety accidents still occur from time to time, some during the construction stage, and some during the completed operation stage. The main reason is the deformation of the rock mass caused by the construction of the tunnel, and the surrounding rock of the tunnel is the deformation that occurs during the construction of the tunnel. main rock ...

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Problems solved by technology

[0004] The present invention intends to provide a method for extracting tunnel surrounding rock information based on digital images, which can solve the problem in the prior art that technical personnel observe and record on the spot and draw sketches, and the results of characteristic analysis and discrimination of tunnel surrounding rock are not accurate enough technical issues

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