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

<div>Contour map of vertical stress in the floor of gob of the upper protective layer. (a) Vertical stress in the floor of the upper side and (b) vertical stress in the floor of the lower side.</div>

Shock and Vibration

fig6

Figure 6

Figure 6: Study on Reasonable Layout of Upper Protective Layer for Prevention Rock Burst under Coal Seam Group with Close Quarters Conditions 