Experimental Study on Deformation and Acoustic Emission Characteristics of Arch Roadway under Different Unloading Rates

<div>Mechanical mechanism model of the roadway under excavation unloading. (a) The theoretical model of roadway excavation. (b) Stress paths of excavation unloading test.</div>

Advances in Civil Engineering

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Figure 5

Figure 5: Experimental Study on Deformation and Acoustic Emission Characteristics of Arch Roadway under Different Unloading Rates 