Quantitative Evaluation and Case Study of Risk Degree for Underground Goafs with Multiple Indexes considering Uncertain Factors in Mines

Figure 6

The distinct geostatic activities and scene of accident of Dabaoshan mine. (a) shows the pillar cracking phenomenon, (b) shows the large-scale falling in a underground goaf, and (c) shows the landslide accident caused by the collapse of underground goafs.

(a)

(b)

(c)