Study of Acoustic Emission and Mechanical Characteristics of Coal Samples under Different Loading Rates

Table 1

Mechanical parameters of coal samples.

Serial number	Loading rate/mm·s^−1	Peak stress/MPa		Peak strain/10^−3		Elastic modulus/GPa
		Experiment value	Average value	Experiment value	Average value	Experiment value	Average value
M1	0.001	20.750	22.67	5.368	6.191	4.094	4.281
M2	0.001	23.400		6.878		4.574
M3	0.001	22.650		6.328		4.175
M4	0.002	25.244	24.99	9.035	7.411	3.923	4.21
M5	0.002	25.990		7.978		4.373
M6	0.002	23.740		5.219		4.334
M7	0.005	27.578	28.01	7.309	8.203	4.030	4.196
M8	0.005	26.910		7.382		4.145
M9	0.005	29.530		9.919		4.414