Experimental Study on the Effects of Stress-Induced Damage on the Microstructure and Mechanical Properties of Soft Rock

Table 1

Correlation analysis of the microstructural and mechanical parameters under uniaxial compression.

Parameters		N	φ	PI	PII	PIII	PIV		E
N	r	1	−0.275	0.528	0.167	−0.278	−0.559	0.918	0.598
	value		0.598	0.281	0.751	0.594	0.249	0.010	0.210
Φ	r	−0.275	1	−0.896	−0.723	0.907	0.698	−0.168	−0.797
	value	0.598		0.016	0.104	0.013	0.123	0.751	0.058
PI	r	0.528	−0.896	1	0.784	−0.924	−0.896	0.363	0.963
	value	0.281	0.016		0.065	0.008	0.016	0.479	0.002
PII	r	0.167	−0.723	0.784	1	−0.901	−0.810	−0.011	0.830
	value	0.751	0.104	0.065		0.014	0.051	0.983	0.041
PIII	r	−0.278	0.907	−0.924	−0.901	1	0.773	−0.184	−0.921
	value	0.594	0.013	0.008	0.014		0.071	0.727	0.009
PIV	r	−0.559	0.698	−0.896	−0.810	0.773	1	−0.267	−0.889
	value	0.249	0.123	0.016	0.051	0.071		0.609	0.018
	r	0.918	−0.168	0.363	−0.011	−0.184	−0.267	1	—
	value	0.010	0.751	0.479	0.983	0.727	0.609		—
E	r	0.244	0.585	−0.525	−0.910	0.767	0.523	0.357	1
	value	0.641	0.223	0.285	0.012	0.075	0.287	0.488