Instability mechanism and anchoring control technology of expansive weakly cemented soft rock roadway
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School of Architecture and Civil Engineering, Liaocheng University, Liaocheng, China
Submission date: 2022-10-22
Final revision date: 2023-04-27
Acceptance date: 2023-04-27
Online publication date: 2023-06-03
Publication date: 2023-07-31
Corresponding author
Wei Zhang   

School of Architecture and Civil Engineering, Liaocheng University, China
Journal of Theoretical and Applied Mechanics 2023;61(3):465-480
A long-term discontinuous development of the plastic zone and broken zone of weakly ce- mented surrounding rock is the main reason for instability of the surrounding rock of a roadway. The load-bearing support concept of “allowable deformation + releasable pres- sure + limited deformation” for a weakly cemented soft rock roadway is proposed, and an “allow-release-limit” support structure mechanical model with U-shaped steel as the main body is established. Anchoring control measures of “U-shaped steel + flexible material wall backfill + key parts strengthening” can solve problems of large deformation and long defor- mation duration of weakly cemented roadways.
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