Numerical Modeling on Hydraulic Fracturing in Coal-Rock Mass for Enhancing Gas Drainage

<div>Evolution process of pore pressure (figure on left side) and cracks (figure on right side). (a) Step 9.5_45 (<i>t</i> = 2.5 min). (b) Step 14.5_3 (<i>t</i> = 7.5 min). (c) Step 19.5_23 (<i>t</i> = 12.5 min). (d) Step 24_9 (<i>t</i> = 17 min).</div>

Advances in Civil Engineering

fig12

Figure 12

Figure 12: Numerical Modeling on Hydraulic Fracturing in Coal-Rock Mass for Enhancing Gas Drainage 