Field and Numerical Investigation on the Coal Pillar Instability of Gob-Side Entry in Gently Inclined Coal Seam

<div>Horizontal displacement distribution of coal pillar. (a) Excavation of 21015 entry. (b) Excavation of 21015 working face.</div>

Advances in Civil Engineering

Figure 9: Field and Numerical Investigation on the Coal Pillar Instability of Gob-Side Entry in Gently Inclined Coal Seam 