Research Article
Experiment and Application of Coalcrete on Roadway Stability: A Comparative Analysis
Table 3
Properties of support materials.
| | Parameters, unit | Rock bolt | U-shaped shed | Shotcrete |
| | Elastic modulus, GPa | 200 | 200 | 30 | | Poisson’s ratio | 0.3 | 0.25 | 0.15 | | Diameter/thickness, mm | 22 | 15 | 100 | | Unit weight, kN/m3 | — | — | 24 | | Length, mm | 2400 | — | — | | Pretensioning, kN | 80 | — | — |
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