Mechanical Behavior and Impact Resistance Tendency of Coal Mass with Different Water Content

Table 3

Energy characteristics of coal samples with different water content.

Number	-1	A-2	-3	-4	-5	-6	-7	-8
80% before peak (MPa)	4.708	9.440	8.632	12.444	7.596	15.068	6.660	31.712
80% of total energy before peak (mJ/mm^3)	0.728	1.793	1.120	2.201	2.796	3.854	0.926	13.932
80% elastic energy before peak (mJ/mm^3)	0.602	1.488	0.890	2.004	1.823	3.145	0.870	9.096
80% dissipated energy before peak (mJ/mm^3)	0.126	0.305	0.230	0.197	0.973	0.710	0.056	4.836
Elastic energy index (WET)	4.777	4.876	3.877	10.172	1.873	4.432	15.615	1.881
Pre peak stored energy (mJ/mm^3)	1.325	2.581	1.768	3.791	2.863	4.949	1.520	19.370
Total energy (mJ/mm^3)	2.042	4.149	3.355	5.517	11.170	8.004	2.196	80.800
Postpeak failure energy (mJ/mm^3)	0.717	1.568	1.587	1.726	8.307	3.055	0.676	61.430
Impact energy index (KE)	1.848	1.646	1.114	2.197	0.345	1.620	2.249	0.315
Peak energy (total energy)	1.315	2.274	1.774	3.851	2.911	5.067	1.512	19.301