Study on the Upper Limit of Roof Failure in Soft Rock Roadway

Table 4

Stepwise loading table of the experimental model.

Steps	Surrounding rock stress (MPa)	Applied vertical load (kN)	Applied horizontal load (kN)
Step 1	0.63	27.5	3.3
Step 2	1.25	60.3	7.2
Step 3	1.88	93.0	11.2
Step 4	2.50	125.8	15.1
Step 5	3.13	158.6	19.0
Step 6	3.75	191.3	23.0
Step 7	4.38	224.1	26.9
Step 8	5.10	262.1	31.5
Step 9	6.10	314.5	37.7
Step 10	7.70	393.1	47.2