Surrounding Rock Stresses on a Working Face-End Roof under Mining Influence

Figure 10

Stress variation of three measuring points under three states: (a) stress variation diagram of three measuring points at the top corner of the roadway before mining; (b) stress variation diagram of three measuring points at the top angle of the roadway end in normal mining; (c) stress variation diagram of three measuring points at the top corner of the end in mining after cutting and reinforcement of the anchor cable.

(a)

(b)

(c)