Evaluating Long-Term Strength and Time to Failure of Sandstone with Different Initial Damage

Table 1

Unloading stress and creep stress levels.

Unloading stress (MPa)	Creep stress (MPa)
	1st	2nd	3rd	4th	5th	6th	7th	8th
25.5	15.7	19.6	23.5	27.4	29.4	31.4	33.4	35.4
31.4	15.7	19.6	23.5	27.4	29.4	31.4	33.4	35.4
35.3	15.7	19.6	23.5	27.4	29.4	31.4	33.4	35.4
38.4	15.7	19.6	23.5	27.4	29.4	31.4	33.4	35.4