Damage Characteristics Caused by Deep-Hole Blasting near Normal Fault and Its Effects on Coal and Gas Outbursts

Figure 18

Photographs of coal and gas outburst in Didao Coal Mine (Heilongjiang Province, China): (a) working face; (b) roof of working face; (c) hole in left side of working face; (d) hole in right side of working face.

(a)

(b)

(c)

(d)