Numerical Simulation of Coal Spontaneous Combustion around a Borehole Induced by Negative Pressure Gas Drainage

Figure 6

Temporal and spatial evolutions of the temperature in the coal body around a borehole at different monitoring points: (a) (0.5, 12), (b) (0.5, 15), (c) (0.5, 17.5), and (d) (0.5, 20).

(a)

(b)

(c)

(d)