Research Article
Deflection Mechanism and Safety Analysis of Coal Mine Shaft in Deep Soil Strata
Table 4
Actual parameters of shaft lining in the soil section.
| z (m) | Strength grade | Ec (×104 MPa) | fc (MPa) | Dn (mm) | (mm) |
| 0∼100 | C30 | 3.00 | 14.3 | 6100 | 7200 | 100∼210 | C40 | 3.25 | 19.1 | 210∼247 | C40 | 3.25 | 19.1 | 6400 | 7800 | 247∼300 | C50 | 3.45 | 23.1 | 300∼340 | C55 | 3.55 | 25.3 | 340∼370 | C60 | 3.60 | 27.5 | 370∼400 | C50 | 3.45 | 23.1 | 7000 | 9000 | 400∼446 | C55 | 3.55 | 25.3 | 446∼498 | C60 | 3.60 | 27.5 | 498∼545 | C65 | 3.65 | 29.7 | 9300 | 545∼595 | C70 | 3.70 | 31.8 |
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