Study on Spontaneous Combustion Law and Prevention Technology of Abandoned Coal in Goaf of Coal Mine

Table 2

Experimental data of thermogravimetric analysis of coal samples at oxidation and combustion stage.

Coal sample number	Ignition temperature range (°C)	Ignition activation energy (kJ/mol)	Relevancy
No. 1 (reference)	117.0~271.4	122.62	0.94725
No. 2 (reference)	162.9~375.4	118.57	0.99586
No. 3 (reference)	146.5~354.1	117.19	0.980740
Layer 15# (no. 5)	154.6~350.0	140.57	0.99517
Layer 8 + 9 # (no. 6)	155.5~336.9	134.86	0.99241
Layer 11# (no. 8)	151.0~326.1	141.8	0.99349
Layer 13# (no. 9)	145.0~328.5	132.34	0.99424
No. 89	179.6~340.7	167.15	0.98739