Characterization of Coal Porosity for Naturally Tectonically Stressed Coals in Huaibei Coal Field, China

Table 1

Vitrinite reflectance, maceral, and composition of deformed coal samples.

Deformation series	Sample; ID	𝑅𝑜,max/%	Deformation degrees	Maceral analysis/%
				Vitrinite	Inertinite	Liptinite	Mineral
Brittle; deformation	Y04	0.95	Weak	78.66	13.86	7.49	—
	L10	1.02	Weak	77.90	11.20	7.60	4.30
	L01	1.16	Weak	76.83	17.71	5.14	0.76
	H12	1.37	Strong	81.26	18.37	—	0.37
	T02	1.41	Strong	86.09	13.52	0.38	—
	Z02	1.93	Weak	84.03	14.82	—	1.14
Ductile; deformation	L04	0.83	Weak	85.33	9.33	4.76	0.57
	K04	1.00	Weak	90.24	8.79	0.76	0.19
	H02	1.38	Strong	94.09	5.12	0.57	0.19
	H09	1.39	Strong	82.55	16.13	0.75	0.56
	H03	1.58	Strong	94.00	2.50	0.50	3.00
	T05	1.66	Strong	90.24	8.12	0.76	0.76