Research Article
Failure Analysis of Deep Composite Roof Roadway and Support Optimization of Anchor Cable Parameters
Table 1
Rock mechanic test results.
| | Li | Normal conditions | Immersion conditions | | σc/MPa | σt/MPa | /MPa | /° | σc/MPa | σt/MPa | /MPa | /° |
| | GR | 40 | 3.8 | 5.6 | 35 | 34 | 3.1 | 4.6 | 32 | | MS | 35 | 2.2 | 4.5 | 36 | 26 | 1.7 | 3.2 | 35 | | FS | 38 | 2.8 | 5.9 | 31 | 28 | 1.5 | 1.9 | 30 | | SM | 15 | 1.3 | 2.2 | 28 | 8 | 0.8 | 0.7 | 26 | | SI | 32 | 3.5 | 4.4 | 35 | 23 | 2.5 | 2.1 | 32 | | MU | 18 | 2.3 | 2.5 | 30 | 5 | 0.7 | 0.6 | 25 | | SI | 33 | 3.4 | 4.5 | 36 | 24 | 2.5 | 1.8 | 35 | | MS | 30 | 2.8 | 3.4 | 33 | 19 | 1.7 | 2.2 | 30 |
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Where GR: grit; MU: mudstone; σc: compressive strength; σt: tensile strength; C: cohesion; f: internal friction angle.
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