Research on Physical Similarity Simulation of Mining Uphill and Downhill at the Large-Angle Working Face

<div>Periodic pressure of the main roof. (a) The whole picture of the model after the breakage of the main roof. (b) The breakage of the main roof. (c) Separation of the overlying strata.</div>

Advances in Civil Engineering

fig7

Figure 7

Figure 7: Research on Physical Similarity Simulation of Mining Uphill and Downhill at the Large-Angle Working Face 