The Effect of Joint Damage on a Coal Wall and the Influence of Joints on the Abutment Pressure on a Fully Mechanised Working Face with Large Mining Height

Figure 8

Comparison of numerical and theoretical results under different conditions with the coal with joints at H = 6 m. (a) α = 45°, β = 0° and n = 1. (b) α = 45°, β = 45° and n = 1. (c) α = 45°, β = 45° and n = 2 (joints located at two ends of the model). (d) α = 45°, β = 45° and n = 2 (joints located in the middle of the model).

(a)

(b)

(c)

(d)