Study on Reasonable Layout of Upper Protective Layer for Prevention Rock Burst under Coal Seam Group with Close Quarters Conditions

Figure 11

The vertical stress distribution behaviors of cross section during stage II. (a) The mining face of panel 3203 is 0 m away from boundary line, (b) the mining face of panel 3203 is 45 m away from boundary line, (c) the mining face of panel 3203 is 90 m away from boundary line.

(a)

(b)

(c)