Study on the Mine Pressure Law and the Pressure Frame Mechanism of an Overlying Goaf in a Shallow Coal Seam

Figure 11

Evolution of displacement and stress in coal seam mining for the case where excavation of the lower coal seam was pushed over the boundary coal pillar by 10 m. (a) Nephogram of stope displacement. (b) Vertical stress cloud map of stope.

(a)

(b)