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

Table 2

The movement of overlying strata with different mining thicknesses.

Thickness (m)	Maximum height of the fault zone (m)	Front caving angle (°)	Back caving angle (°)
9	50.84	59	57
15	85.32	60	62
25	115.85	62	68