Table 3 Sandstone expansion rate test data.
Sandstone type | Expansion of sandstone at different times \({V}_{H}\)/% | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
0 min | 10 min | 20 min | 30 min | 40 min | 50 min | 60 min | 360 min | 720 min | 1440 min | |
Unmined sandstone | 0 | 0 | 0 | 0.2 | 0.2 | 0.2 | 0.3 | 0.4 | 0.4 | 0.4 |
Mining sandstone | 0 | 0 | 0.4 | 0.5 | 0.5 | 0.5 | 0.6 | 0.6 | 0.7 | 0.7 |
