Seismic Response Analysis of Deep Underground Roadways and Coal Pillars under the Influence of the Adjacent Goaf

Figure 12

Cloud diagram of the comparison of the vertical stress under 5 and 20 m wide coal pillar under the Loma seismic wave: in (a), (b), (c), and (d), vertical section distances to the goafs are 0.5, 1.5, 2.5, and 3.5 m, respectively.

(a)

(b)

(c)

(d)