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

Figure 2

Strong ground pressure accident. (a) Bulge of working face 42105 roadway floor. (b) Breaking of hydraulic prop. (c) Fracture of hinge pin. (d) Bulge of gob-side roadway auxiliary side. (e) Bulge of gob-side roadway positive side. (f) Heave up of floor.

(a)

(b)

(c)

(d)

(e)

(f)