Deformation and Failure Law of Roadway along Goaf and Reserve Width of Section Coal Pillar

Figure 3

Vertical stress distribution in coal pillars with different widths and surrounding rock of roadway along goaf when the workface was advanced 50 m.

(a) 6 m coal pillar

(b) 7 m coal pillar

(c) 8 m coal pillar

(d) 9 m coal pillar

(e) 10 m coal pillar