Prevention and Control of Spontaneous Combustion of Residual Coals in Acid-Soaked Goaf in Gas Drainage Condition

Table 1

Experimental scheme design conditions setting.

Serial number	Processing conditions		For the wind speed	Heating rate
1	Raw coal		50 mL/min	1.0°C/min
2	Five-day immersed	Air dry for 24 h
3	Soak in weakly acidic water	Air dry for 24 h
4	Preoxidation to 40°C
5	Preoxidation to 55°C
6	Preoxidation to 70°C