Effect of Joint Density on Rockburst Proneness of the Elastic-Brittle-Plastic Rock Mass

Table 3

Energy analysis of rock samples with different joint densities.

Joint density	Parallel joints			Cross joints
	Elastic energy (J)	Dissipated energy (J)	Dissipated energy index	Elastic energy (J)	Dissipated energy (J)	Dissipated energy index
10	8988	1012	0.10	8772	1228	0.12
20	8269	1731	0.17	7856	2144	0.21
30	7687	2313	0.23	7085	2915	0.29
40	7095	2905	0.29	6479	3521	0.35
50	6688	3312	0.33	5963	4037	0.40
60	6336	3664	0.37	5530	4470	0.45
70	6003	3997	0.40	5078	4922	0.49
80	5720	4280	0.43	4768	5232	0.52
90	5523	4477	0.45	4481	5519	0.55
100	5236	4764	0.48	4173	5827	0.58
120	4891	5109	0.51	3812	6188	0.62
140	4568	5432	0.54	3473	6527	0.65
160	4301	5699	0.57	3194	6806	0.68
180	4099	5901	0.59	2978	7022	0.70
200	3881	6119	0.61	2756	7244	0.72
300	3212	6788	0.68	1992	8008	0.80
400	2763	7237	0.72	1464	8536	0.85