Strain Rate Effect on Acoustic Emission Characteristics and Energy Mechanisms of Karst Limestone under Uniaxial Compression

Table 1

Mechanical parameters of the karst limestone under different strain rates.

No.	Loading rate (mm/s)	Strain rate (ε′/s)	lg(ε′)	Peak strain (10^−3)	σpeak (MPa)	E (GPa)	Es (GPa)	Es/E
S11	0.0005	5 × 10^−6	−5.30	2.60	91.53	54.57	29.79	0.55
S12	0.0005	5 × 10^−6	−5.30	2.08	81.54	52.52	33.62	0.64
S21	0.002	2 × 10^−5	−4.70	2.24	116.00	62.03	48.79	0.79
S22	0.002	2 × 10^−5	−4.70	2.36	116.16	66.42	41.21	0.62
S31	0.01	1 × 10^−4	−4.00	2.74	130.78	60.59	42.05	0.69
S32	0.01	1 × 10^−4	−4.00	2.81	133.16	66.25	49.72	0.75
S41	0.05	5 × 10^−4	−3.30	2.39	153.42	63.24	43.61	0.69
S42	0.05	5 × 10^−4	−3.30	3.61	149.78	64.29	32.90	0.51