Effect of Acid and Alkaline Environment on Dynamic Strength and Porosity Characteristics of Bursting Liability Coal

Figure 5

Surface micromorphology of coal samples with different bursting liabilities: (a), (b) strong bursting liability; (c), (d) weak bursting liability; (e), (f) no bursting liability.

(a)

(b)

(c)

(d)

(e)

(f)