Upper Bound Solution of Surrounding Rock Pressure for Deep Cavity Using Nonlinear Hoek–Brown Failure Criterion

Table 3

Upper bound solution of the surrounding rock pressure q at different l and h.

l (m)	q (kPa)
	h = 5 m	h = 6 m	h = 7 m	h = 8 m	h = 9 m	h = 10 m
5	15.0	19.4	25.1	32.9	42.2	53.0
6	20.3	24.9	31.2	39.7	49.8	61.3
7	26.6	31.3	38.3	47.4	58.3	70.5
8	33.9	38.7	46.3	56.1	67.5	80.4
9	42.0	47.0	55.2	65.5	77.6	91.1
10	50.9	56.2	64.9	75.8	88.3	102.5