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

Figure 9

Stress curves of three measuring points at the top corner of the end under three conditions: (a) stress variation curves of measuring point 1 under three states; (b) stress variation curves of measuring point 2 under three states; (c) stress variation curves of measuring point 3 under three states

(a)

(b)

(c)