Research on Stress Threshold of Deep Buried Coal Rock under Quasi-Static Strain Rate Based on Acoustic Emission

Table 2

Stress thresholds under uniaxial and triaxial conditions.

Confining pressure	0 MPa [43]		25 MPa		0 MPa [43]		25 MPa
10^–5	0.790	0.627	0.542	0.544	0.915	0.883	0.835	0.848
	0.550		0.551		0.908		0.785
	0.541		0.539		0.825		0.924
10^–4	0.495	0.541	0.380	0.509	0.915	0.850	0.746	0.820
	0.566		0.600		0.849		0.911
	0.561		0.546		0.787		0.803
10^–3	0.507	0.536	0.430	0.358	0.813	0.828	0.727	0.735
	0.596		0.293		0.863		0.596
	0.505		0.350		0.807		0.882