Research Article
Stress Evolution Law of Surrounding Rock with Gob-Side Entry Retaining by Roof Cutting and Pressure Release in Composite Roof
Figure 10
Vertical stress field during excavation: (a) 20 m; (b) 40 m; (c) 80 m; (d) 120 m. (unit: Pa).
(a) |
(b) |
(c) |
(d) |