A Study of the Solid-Liquid-Gas Three-Phase Coupling Relationship of Coal, Water and Gas

Table 2

Shear strength index under different water content conditions.

No.	Water content (%)	(kPa)	(kPa)	(kPa)	(kPa)	Cohesion; (kPa)	Tan	Angle of internal friction; (°)
1	2.12	8.963	15.588	31.956	62.353	0.881	0.154	8.744
2	3.60	8.262	16.368	30.397	63.132	0.251	0.156	8.878
3	4.98	9.548	16.173	34.684	64.106	1.576	0.158	8.956
4	6.77	8.963	16.173	31.566	59.235	2.025	0.144	8.183
5	8.66	9.353	18.511	33.515	62.158	2.914	0.149	8.486
6	10.18	9.821	16.952	31.761	60.209	2.665	0.144	8.200
7	11.90	9.431	17.147	30.202	59.625	2.360	0.143	8.116
8	13.96	9.431	15.588	28.448	59.625	1.234	0.144	8.205
9	15.40	8.379	15.276	29.812	60.794	0.385	0.150	8.548
10	16.64	8.184	15.783	27.864	60.015	0.322	0.147	8.385
11	19.21	8.184	15.588	31.566	60.989	0.737	0.151	8.598
12	19.01	8.768	16.173	32.151	61.963	1.203	0.152	8.660
13	21.93	8.574	16.056	35.073	65.860	0.478	0.165	9.364