Table 1 Calculation results contrast of pressure.
From: Calculation method and evaluation of surrounding rock pressure of vertical shaft
Rock strata | Depth of measuring point/m | Calculation results of surrounding rock pressure/MPa | Â | ||||
|---|---|---|---|---|---|---|---|
Heavy liquid formula | Qin's formula | Cylindrical retaining wall theory | Sandwich wall theory | Axisymmetric layered method | Measured values | ||
Siltstone | 178 | 2.3140 | 1.8650 | 1.7950 | 1.6155 | 0.4395 | 0.1380 |
Medium sandstone | 221 | 2.8730 | 2.176 | 2.005 | 1.7243 | 0.5130 | 0.2580 |
Coarse sandstone | 280 | 3.6400 | 2.690 | 2.3216 | 1.9733 | 0.4890 | 0.2790 |
Variegated siltstone | 327 | 4.2510 | 3.585 | 2.7204 | 2.3123 | 0.9495 | 0.6375 |
Medium sandstone | 382 | 4.9660 | 3.663 | 3.0109 | 2.5291 | 0.8610 | 0.7815 |
Fine sandstone | 428 | 5.5640 | 4.010 | 3.1182 | 2.6192 | 0.8460 | 0.7935 |
