Fig. 9
Stress distribution in the surrounding rock of the working face under different width conditions (The profile is X=3230m): (a) Plane stress diagram of working face with a width of 150m; (b) Profile stress diagram of working face with a width of 150m; (c) Plane stress diagram of working face with a width of 175m; (d) Profile stress diagram of working face with a width of 175m; (e) Plane stress diagram of working face with a width of 200m; (f) Profile stress diagram of working face with a width of 200m; (g) Plane stress diagram of working face with a width of 225m; (h) Profile stress diagram of working face with a width of 225m; (i) Plane stress diagram of working face with a width of 250m; (j) Profile stress diagram of working face with a width of 250m; (k) Plane stress diagram of working face with a width of 275m; (l) Profile stress diagram of working face with a width of 275m; (m) Plane stress diagram of working face with a width of 300m; (n) Profile stress diagram of working face with a width of 300m.
