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

Table 5

Comparison of ignition activation energy between coal samples without and with 4% MgCl₂ inhibitor.

Coal sample number	No blocking agent coal		After adding inhibitor coal		Change in activation energy
	No. 1 (reference)	122.62	0.947295	122.56	0.947112	-0.06
No. 2 (reference)	118.57	0.995854	169.34	0.947728	50.77
No. 3 (reference)	117.19	0.980744	155.03	0.949703	37.13
No. 5 (layer 15#)	140.57	0.994579	150.68	0.992349	10.11
No. 6	134.86	0.992412	168.12	0.970989	33.26
No. 8	141.80	0.992549	167.43	0.946054	25.63
No. 9	132.34	0.993876	128.63	0.994922	-3.71