Calculation Model of Rock Fracture Pressure with Multifields in the Process of Fracturing

Table 1

Results of three axial compression tests of rock cores with different water contents [6].

Confining pressure	Soaking	Water content	Compressive strength	Poisson	Tensile strength
	time/	/%	/MPa	ratio	/MPa
15MPa	0	0	92.63	0.2	6.18
	0.5	0.38	84.21	0.18	5.61
	1	0.53	81.675	0.25	5.45
	2	0.63	75.35	0.2	5.02
	3	0.68	74.915	0.27	4.99
	4	0.69	71.65	0.2	4.78
	5	0.7	70.38	0.31	4.69
20MPa	0	0	99.83	0.3	6.66
	0.5	0.42	92.58	0.2	6.17
	1	0.65	89.23	0.26	5.95
	2	0.71	84.67	0.22	5.64
	3	0.73	83.355	0.31	5.56
	4	0.76	80.69	0.21	5.38
	5	0.81	77.435	0.21	5.16
25MPa	0	0	105.22	0.21	7.01
	0.5	0.43	102.52	0.2	6.83
	1	0.57	94.565	0.23	6.30
	2	0.65	91.1	0.19	6.07
	3	0.74	89.365	0.24	5.96
	4	0.82	87.91	0.18	5.86
	5	0.86	87.54	0.25	5.84