Abstract:A long-term discontinuous development of the plastic zone and broken zone of weakly cemented surrounding rock is the main reason for instability of the surrounding rock of a roadway. The load-bearing support concept of "allowable deformation + releasable pressure + 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 m… Show more
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