Assessment of Bearing Capacity and Stiffness in New Steel Sets Used for Roadway Support in Coal Mines
Abstract
:1. Introduction
2. Materials and Methods
2.1. Full-Sacle Sets Used In Situ
2.2. Scaled Sets Used in Experiments
2.3. Scaled Sets Loading State in Experiments
2.4. Deformation and Stress Monitor in Experiments
3. Results
3.1. Displacement in Experiments
3.1.1. Horizontal Displacement in Top Arch
3.1.2. Vertical Displacement in Bottom Arch
3.2. Stresses in Experiments
3.2.1. Stresses in Top Arch
3.2.2. Stresses in Floor Beam
3.2.3. Stresses in Roof Beam
4. Discussion
5. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Pattern | Theoretical Mass m (kg/m) | Sectional Area A (cm2) | Section Thickness at Neutral Axis d (cm) | Moment of Inertia I (cm4) | Elastic Modulus E (GPa) | Section Modulus W (cm3) | Static Moment S (cm3) |
---|---|---|---|---|---|---|---|
36 U-steel | 35.87 | 45.69 | 1.56 | 928.65 | 200 | 141.22 | 330.05 |
12.6 I-steel | 14.223 | 18.118 | 0.5 | 488 | 200 | 77.5 | 44.985 |
Results | Model 1 | Model 2 | Model 3 | Model 4 |
---|---|---|---|---|
MBC (kN) | 176.8 | 162.5 | 277.0 | 288.3 |
Horizontal Stiffness fh (kN/mm) | 10.746 | 9.878 | 31.508 | 36.678 |
Results | Model 1 | Model 2 | Model 3 | Model 4 |
---|---|---|---|---|
MBC (kN) | 258.8 | 392.1 | 351.0 | 501.9 |
Vertical Stiffness fv (kN/mm) | 21.831 | 78.069 | 76.766 | 80.604 |
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Yang, R.; Li, Q.; Li, Q.; Zhu, X. Assessment of Bearing Capacity and Stiffness in New Steel Sets Used for Roadway Support in Coal Mines. Energies 2017, 10, 1581. https://doi.org/10.3390/en10101581
Yang R, Li Q, Li Q, Zhu X. Assessment of Bearing Capacity and Stiffness in New Steel Sets Used for Roadway Support in Coal Mines. Energies. 2017; 10(10):1581. https://doi.org/10.3390/en10101581
Chicago/Turabian StyleYang, Renshu, Qinghai Li, Qing Li, and Xianlei Zhu. 2017. "Assessment of Bearing Capacity and Stiffness in New Steel Sets Used for Roadway Support in Coal Mines" Energies 10, no. 10: 1581. https://doi.org/10.3390/en10101581