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

Table 2

Simulation scheme.

Temperature		Gasifier cavities shape	Coal pillar width
Room temperature (20 °C)		Traditional rectangular	6m–25 m
		Drop-shaped	6m–25 m
High temperature	700 °C		15m–21 m
	850 °C
	1000 °C
	1150 °C
	1300 °C