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

<div>The relation between the unfilled height, thickness of immediate roof which needs to be controlled, and the mining thickness. (a) Unfilled height and mining thickness. (b) Thickness of the immediate roof which needs to be controlled.</div>

Advances in Civil Engineering

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Figure 2

Figure 2: Effect of Mining Thickness on Overburden Movement and Underground Pressure Characteristics for Extrathick Coal Seam by Sublevel Caving with High Bottom Cutting Height 

Figure 2 | Effect of Mining Thickness on Overburden Movement and Underground Pressure Characteristics for Extrathick Coal Seam by Sublevel Caving with High Bottom Cutting Height 