Failure Mechanism of a Coal-Rock Combined Body with Inclinations of Structural Planes and a Calculation Model for Impact Energy

Table 8

Cumulative AE energy before failure of CR combined specimens.

Serial number of specimens	Predicted cumulative AE energy before impact-induced failure (ms·mV)	Measured cumulative AE energy before impact-induced failure (ms·mV)	Relative error
CR-0-1	8677	8875	2.3
CR-0-2	9444	9036	−4.3
CR-0-3	11181	10936	−2.2
Mean	9735	9616
CR-15-1	6324	5846	−7.6
CR-15-2	7917	7425	−6.2
CR-15-3	6348	6532	2.9
Mean	6840	6601
CR-30-1	3730	3801	1.9
CR-30-2	5003	4832	−3.4
CR-30-3	4106	4026	−1.9
Mean	4261	4220
CR-45-1	2980	2871	−3.7
CR-45-2	3723	3611	−3
CR-45-3	3183	3425	7.6
Mean	3287	3302