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1 Journal of Theoretical and Applied Mechanics

1 2023

1 Zhang W.

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Instability mechanism and anchoring control technology of expansive weakly cemented soft rock roadway

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Zhang W.

Journal of Theoretical and Applied Mechanics

2023

tom Vol. 61 nr 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.