Influence of Upper Seam Extraction on Abutment Pressure Distribution during Lower Seam Extraction in Deep Mining

<div>Numerical simulation. (a) Model A (presence of siltstone key strata between two seams). (b) Model B (absence of key strata between two seams). ① Upper seam. ② Lower seam.</div>

Advances in Civil Engineering

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Figure 5

Figure 5: Influence of Upper Seam Extraction on Abutment Pressure Distribution during Lower Seam Extraction in Deep Mining 