Mechanism and Control Technology of Rockburst Induced by Thick Hard Roof and Residual Coal Pillar: A Case Study

Figure 6

Abutment pressure of 4-2# coal seam. (a) 42107 working face mining 0 m. (b) 42107 working face mining 400 m. (c) 42107 working face mining 550 m. (d) 42107 working face mining 700 m. (e) 42107 working face mining 800 m. (f) 42107 working face mining 1000 m. (g) 42107 working face mining 1200 m.

(a)

(b)

(c)

(d)

(e)

(f)

(g)