Research on Mechanisms and Control Measures of Surrounding Rock Disaster in Large Section Roadway with Top Coal under the Influence of Tectonic Stress

Figure 12

Distribution characteristics of plastic zone of roadway surrounding rock. (a) λ = 1.0; (b) λ = 1.3; (c) λ = 1.6; (d) λ = 1.9; (e) λ = 2.2; (f) λ = 2.5.

(a)

(b)

(c)

(d)

(e)

(f)