Effect of Mining Thickness on Overburden Movement and Underground Pressure Characteristics for Extrathick Coal Seam by Sublevel Caving with High Bottom Cutting Height

<div>Stress variation curves with different layers of overlying strata in different coal thicknesses with advance of working faces. (a) 9.0 m; (b) 15.0 m; (c) 25 m.</div>

Advances in Civil Engineering

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Figure 8

Figure 8: Effect of Mining Thickness on Overburden Movement and Underground Pressure Characteristics for Extrathick Coal Seam by Sublevel Caving with High Bottom Cutting Height 

Figure 8 | Effect of Mining Thickness on Overburden Movement and Underground Pressure Characteristics for Extrathick Coal Seam by Sublevel Caving with High Bottom Cutting Height 