Study on Mechanism and Control Technology of Asymmetric Floor Heave in a Deep Soft Rock Main Roadway

Figure 4

Deformation and failure of 1# main roadway. (a) Bolt broken. (b) Cracking of the shotcrete layer. (c) Large overall rib-to-rib displacement. (d) Floor heave.

(a)

(b)

(c)

(d)