Experimental Investigation on the Release Rule of the Gas Expansion Potential of Loaded Water-Filled Soft Coal

Table 3

Experimental data of the expansion energy release experiment under the conditions of different water contents and adsorption pressures.

Moisture (%)
4.50	Adsorption (MPa)	0.609	0.642	0.662	0.694	0.708	0.728	0.755	0.783	0.842	0.892
	Piston (m)	0.69	0.77	0.82	0.84	0.86	0.57	0.74	0.80	0.97	1.05
	Conclusion	No	No	No	No	No	Yes	Yes	Yes	Yes	Yes
	Coal output (kg)	—	—	—	—	—	0.35	0.46	0.467	0.474	0.481
4.80	Adsorption (MPa)	0.632	0.692	0.745	0.76	0.762	0.789	0.813	0.852	0.886	0.902
	Piston (m)	0.66	0.77	0.83	0.83	0.84	0.48	0.57	0.69	0.79	0.81
	Conclusion	No	No	No	No	No	Yes	Yes	Yes	Yes	Yes
	Coal output (kg)	—	—	—	—	—	0.26	0.35	0.38	0.421	0.452
5.10	Adsorption (MPa)	0.694	0.756	0.785	0.806	0.815	0.822	0.838	0.856	0.876	0.899
	Piston (m)	0.71	0.80	0.80	0.81	0.77	0.27	0.37	0.37	0.47	0.53
	Conclusion	No	No	No	No	No	Yes	Yes	Yes	Yes	Yes
	Coal output (kg)	—	—	—	—	—	0.28	0.32	0.35	0.39	0.385
5.40	Adsorption (MPa)	0.725	0.753	0.796	0.823	0.856	0.884	0.895	0.923	0.933	0.949
	Piston (m)	0.74	0.79	0.82	0.82	0.79	0.23	0.32	0.42	0.47	0.55
	Conclusion	No	No	No	No	No	Yes	Yes	Yes	Yes	Yes
	Coal output (kg)	—	—	—	—	—	0.22	0.28	0.36	0.38	0.39