Research on the Settlement Regulation and Stability of Large Building Foundation over Gobs: A Case Study in the Xiangcheng Coal Mine, China

Figure 12

(a) Fracture distribution of the loose layer after mining; (b) fracture closure of the loose layer under the action of the first level of loading; (c) fracture distribution of the gob when coal pillar instability occurs under the third level of loading.

(a)

(b)

(c)