Numerical Investigation of Gob-Side Entry Retaining through Precut Overhanging Hard Roof to Control Rockburst

Figure 6

Distribution of vertical abutment pressure under the conventional mining and GERPOHR condition. (a) Conventional mining to excavate upper working face. (b) Conventional mining to excavate second working face. (c) Precut overhanging hard roof mining to excavate upper working face. (d) Precut overhanging hard roof mining to excavate second working face.

(a)

(b)

(c)

(d)