Study on Mechanical Properties and Damage Evolution Law of Secondary Destruction Induced by Simultaneous Unloading after the Peak of the Curve of Sandstone

Table 2

Energy conversion parameter table.

Confining pressure (MPa)	(kJ/m^3)	(kJ/m^3)	(kJ/m^3)	(kJ/m^3)	(kJ/m^3)	(kJ/m^3)	(s)	(s)	(kJ/m^3/s)	(kJ/m^3/s)	(kJ/m^3)		(kJ/m^3)
5	41.58	57.08	43.73	8.48	2.43	2.44	3.89	2.32	11.24	1.05	0	0.87	47.74
10	80.51	38.39	18.30	0.17	6.33	13.59	4.92	4.09	3.72	1.55	42.12	0.98	81.9
20	118.00	100.63	46.07	48.60	5.96	0	4.36	1.78	10.57	3.35	17.37	1	117.53
30	178.20	36.97	75.28	3.69	0	−42.25	4.41	0	17.07	0	141.23	0.91	196.91
40	227.88	4.88	68.19	10.45	0	−3.76	2.57	0	26.53	0	223.00	0.92	248.82