Investigation on Coal Pillar Stability between Different Shapes of Gasifier Cavities under High Temperatures during UCG

<div>Volume change curves of different plastic failure methods for different gasifier cavity shapes and coal pillar widths at room temperature: (a) traditional rectangular gasifier cavities and (b) drop-shaped gasifier cavities.</div>

Geofluids

fig9

Figure 9

Figure 9: Investigation on Coal Pillar Stability between Different Shapes of Gasifier Cavities under High Temperatures during UCG 