Research on the Influence of Mining Height on the Movement Characteristics of Overlying Strata during Extremely Thick Coal Seam Fully Mechanized Sublevel Caving Mining

<div>The first caving of top coal. (a) The mining height is 4 m and the working face is pushed 29.68 m. (b) The mining height is 7.5 m and the working face is pushed 22.08 m.</div>

Advances in Civil Engineering

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Figure 2

Figure 2: Research on the Influence of Mining Height on the Movement Characteristics of Overlying Strata during Extremely Thick Coal Seam Fully Mechanized Sublevel Caving Mining 

Figure 2 | Research on the Influence of Mining Height on the Movement Characteristics of Overlying Strata during Extremely Thick Coal Seam Fully Mechanized Sublevel Caving Mining 