Roadway Surrounding Rock under Multi-Coal-Seam Mining: Deviatoric Stress Evolution and Control Technology

Figure 5

Deviatoric stress curves after mining of N8707 and N8709 coal faces in No. 7-4 coal seam: (a) deviatoric stress curves in coal pillar and solid-coal side; (b) deviatoric stress curves of the roof; (c) deviatoric stress curves of the bottom.

(a)

(b)

(c)