Evolution Law of Coal Seam Abutment Pressure under the Influence of Shallow Buried Complex Strata: A Case Study

Figure 5

Overlying strata movement in seam mining. (a) Working face advancing 10 m. (b) Working face advancing 50 m. (c) Working face advancing 60 m. (d) Working face advancing 70 m. (e) Working face advancing 80 m. (f) Stability of overlying strata after working face advancing for 80 m. (g) Schematic diagram of the key layer above working face.

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