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

<div>Test system. (a) The diagram of displacement measuring points and displacement measured by the total station. (b) The connection of strain brick and testing instrument.</div>

Advances in Civil Engineering

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Figure 3

Figure 3: Effect of Mining Thickness on Overburden Movement and Underground Pressure Characteristics for Extrathick Coal Seam by Sublevel Caving with High Bottom Cutting Height 

Figure 3 | Effect of Mining Thickness on Overburden Movement and Underground Pressure Characteristics for Extrathick Coal Seam by Sublevel Caving with High Bottom Cutting Height 