Theoretical and Experimental Study on the Mechanism of Instability and Firing Gas in Hard Quartz Sandstone

Figure 9

Typical experimental phenomenon of different methane concentrations. (a) 4.3% VOL. (b) 6.0% VOL. (c) 8.6% VOL. (d) 10.3% VOL. (e) 12.0% VOL.

(a)

(b)

(c)

(d)

(e)