Figure 11
From: Investigation on the pore characteristics of coal specimens with bursting proneness
Images obtained by SEM. (a) image of Hongqinghe Coal Mine with magnification of 50; (b) image of Hongqinghe Coal Mine with magnification of 500; (c) image of Nalinhe Coal Mine with magnification of 50; (d) image of Nalinhe Coal Mine with magnification of 750.
