Study on Overburden Rock Movement and Stress Distribution Characteristics under the Influence of a Normal Fault

Figure 11

Distribution of the vertical stress at different spacings between the mining face and fault in the footwall. (a) When the working face is 80 m away from the fault. (i) Strike at the middle of the working face. (ii) Horizontal direction of the coal seam. (b) When the working face is 50 m away from the fault. (i) Strike at the middle of the working face. (ii) Horizontal direction of the coal seam. (c) When the working face is 40 m away from the fault. (i) Strike at the middle of the working face. (ii) Horizontal direction of the coal seam. (d) When the working face is 30 m away from the fault. (i) Strike at the middle of the working face. (ii) Horizontal direction of the coal seam. (e) When the working face is 20 m away from the fault. (i) Strike at the middle of the working face. (ii) Horizontal direction of the coal seam. (f) When the working face is 10 m away from the fault. (i) Strike at the middle of the working face. (ii) Horizontal direction of the coal seam. (g) When the working face is 5 m away from the fault. (i) Strike at the middle of the working face. (ii) Horizontal direction of the coal seam.

(a)

(b)

(c)

(d)

(e)

(f)

(g)