Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Study on Fine Numerical Simulation of Arch-locking Bolt in Soft Rock Roadway
Locking bolts are frequently used to control the failure of the supporting arch in soft rock roadway support system, but the design basis of the locking bolts parameters is not clear. In order to investigate the roadway support effect influenced by the position and length of the arch-locking bolt, based on a typical soft rock roadway engineering case, numerical simulation experiments were carried out through an improved numerical simulation approach. The results indicate that: roadway supported without locking bolts deformed seriously, and the arch legs’ inward bending deformation and arch-rock separation were the breakthrough of the overall failure of the support system; the arch-locking bolts suppressed the arch legs inward bending deformation and prevented arch-rock separation, which ensured the integrity of the support system, and the final supporting effect was improved significantly; the deformation value and plastic zone volume both first decrease and then increase with the increasing of the locking bolt height H, and the impact was significant; the support effect tends to be better but not obvious with the increasing the arch-locking bolt length L. Based on the research conclusions, the optimized parameters of the lock arch bolt (H=1.0 m, L=3.0 m) were determined, and the field practice showed the optimization scheme works well.
Study on Fine Numerical Simulation of Arch-locking Bolt in Soft Rock Roadway
Locking bolts are frequently used to control the failure of the supporting arch in soft rock roadway support system, but the design basis of the locking bolts parameters is not clear. In order to investigate the roadway support effect influenced by the position and length of the arch-locking bolt, based on a typical soft rock roadway engineering case, numerical simulation experiments were carried out through an improved numerical simulation approach. The results indicate that: roadway supported without locking bolts deformed seriously, and the arch legs’ inward bending deformation and arch-rock separation were the breakthrough of the overall failure of the support system; the arch-locking bolts suppressed the arch legs inward bending deformation and prevented arch-rock separation, which ensured the integrity of the support system, and the final supporting effect was improved significantly; the deformation value and plastic zone volume both first decrease and then increase with the increasing of the locking bolt height H, and the impact was significant; the support effect tends to be better but not obvious with the increasing the arch-locking bolt length L. Based on the research conclusions, the optimized parameters of the lock arch bolt (H=1.0 m, L=3.0 m) were determined, and the field practice showed the optimization scheme works well.
Study on Fine Numerical Simulation of Arch-locking Bolt in Soft Rock Roadway
2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
Metadata by DOAJ is licensed under CC BY-SA 1.0
Numerical Simulation of Bolt-Mesh-Anchor Support Technology at Soft Rock Roadway
| Trans Tech Publications | 2013
Numerical Simulation Research on Deep Soft Rock Roadway
| British Library Conference Proceedings | 2012
Mine Soft Rock Roadway Fine Blasting Application Technology
| Trans Tech Publications | 2014
The Application of Bolt-Mesh-Anchor Combined Support in Soft Rock Roadway
| Trans Tech Publications | 2012
Study on the Application of Bolt-Grout Reinforcement in the Deep Soft Rock Roadway
| Trans Tech Publications | 2011