Research on the Development Mechanism of Postpeak Cracks in Sandstone under Different Confining Pressures

Table 3

Fitting parameters of cracks width distribution under different stress level for post-peak sandstone.

Parameter	Confining pressure			Confining pressure			Confining pressure
	2MPa			2.5MPa			3MPa
	A	B	C	A	B	C	A	B	C
y1	0.055	0.066	0.052	0.052	0.066	0.086	0.031	0.091	0.061
A1	0.045	0.046	0.053	0.022	0.024	0.021	0.043	0.009	0.043
	0.115	0.130	0.150	0.127	0.142	0.161	0.167	0.183	0.215
	0.012	0.012	0.012	0.009	0.011	0.006	0.019	0.004	0.015