Study on Zonal Cooperative Control Technology of Surrounding Rock of Super Large Section Soft Rock Chamber Group Connected by Deep Vertical Shaft

<div>Convergence state of surrounding rock: (a) variation of relative convergence of roof-to-floor at different positions along roadway axis. (b) Variation of relative convergence of roof-to-floor of each chamber with time changing.</div>

Advances in Civil Engineering

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Figure 3: Study on Zonal Cooperative Control Technology of Surrounding Rock of Super Large Section Soft Rock Chamber Group Connected by Deep Vertical Shaft 

Figure 3 | Study on Zonal Cooperative Control Technology of Surrounding Rock of Super Large Section Soft Rock Chamber Group Connected by Deep Vertical Shaft 