Table 1 Designing for gas pressure and external stress.
From: Experimental study of gas flow and coal deformation at different levels of axial/radial stress ratio
Axial stress/MPa | Radial stress/MPa | Axial/radial stress ratios | Gas pressure/MPa |
|---|---|---|---|
3 | 2 | 1.5 | 1 |
4 | 2 | ||
5 | 2.5 | ||
6 | 3 | ||
7 | 3.5 |
