Fig. 5
Roadway deformation characteristics. The roadway shown in Fig. 4 is a photograph taken by Zi-Long Hui and Xiao-Xiang Wei at the underground site of the 13313 return airway of the Sunjiagou coal mine. We confirm that we are the photographer of the photo. The roadway as a whole shows asymmetric deformation and damage, and the deformation and damage trend of the right side of the roadway is larger than that of the left side. We hold the full copyright of this image and grant Springer Nature Ltd permission to publish it under the Creative Commons Attribution 4.0 International License (CC BY 4.0).This authorization covers all publication formats, including print and digital versions.
