Table 2 Maximum stress and stress increment in the vertical direction for different primary rock stresses.
From: Roadway rock burst prediction based on catastrophe theory
Stress of primary rock /\({\text{MPa}}\) | Maximum stress in the vertical direction /\({\text{MPa}}\) | Stress increment /\({\text{MPa}}\) |
|---|---|---|
1.25 | 2.54 | 2.54 |
2.50 | 5.12 | 2.58 |
3.75 | 7.69 | 2.57 |
5.00 | 10.13 | 2.44 |
6.25 | 12.39 | 2.26 |
7.50 | 14.45 | 2.06 |
8.75 | 16.19 | 1.74 |
10.00 | 17.59 | 1.40 |
11.25 | 18.79 | 1.20 |
12.50 | 19.96 | 1.17 |
13.75 | 22.03 | 2.07 |
15.00 | 24.49 | 2.46 |
16.25 | 26.76 | 2.27 |
17.50 | 28.99 | 2.23 |
18.75 | 31.11 | 2.12 |
20.00 | 33.23 | 2.12 |
21.25 | 35.39 | 2.16 |
22.50 | 37.54 | 2.15 |
23.75 | 39.67 | 2.13 |
25.00 | 41.80 | 2.13 |
