Research Article

A Novel Closed-Form Solution for Circular Openings in Generalized Hoek-Brown Media

Table 4

Comparison of results for very poor quality rock mass (Examples C–E).

Rock example (MPa) (MPa)/ (%)Error (%)
ExactSharan [7]This workSharan [7]This work

C5011.721.721.720.o0.0
501.512.412.562.416.40.0
10017.897.897.890.0 0.0
10112.442.442.440.0 0.0
1001.5113.715.313.711.60.0
1011.513.283.473.275.9−0.3
20010.0 0.0
20415.045.045.040.0 0.0
2001.5117−0.7
2051.514.955.244.935.8−0.4

D8010.940.940.94-0.10.0
801.982.082.222.076.7−0.5
15014.064.054.050.0 0.0
15310.520.520.520.0 0.0
1501.9813.615.213.411.8−1.5
1511.982.652.822.616.5−1.5
30010.0 0.0
30313.923.923.920.0 0.0
3001.9817.2−1.6
3051.984.514.834.437.1−1.8

E1017.917.917.910.0 0.0
10.111.731.731.730.0 0.0
101.399.82.3
10.11.392.222.322.244.80.9
3010.0 0.0
30.518.988.988.980.0 0.0
301.3914.5−0.2
30.61.399.710.429.77.50.0
5010.0 0.0
5214.724.724.720.0 0.0
501.3915.8−0.4
52.21.394.394.544.373.5−0.5