FLAC3D simulation application of roadway support effect under non-original rock stress

Jie Li; Xinghua Li; Fuguang Liu

doi:10.1117/12.2635427

6 May 2022 FLAC^3D simulation application of roadway support effect under non-original rock stress

Jie Li, Xinghua Li, Fuguang Liu

Proceedings Volume 12256, International Conference on Electronic Information Engineering, Big Data, and Computer Technology (EIBDCT 2022); 122562V (2022) https://doi.org/10.1117/12.2635427
Event: 2022 International Conference on Electronic Information Engineering, Big Data and Computer Technology, 2022, Sanya, China

Abstract

Numerical simulation is an effective tool for solving geotechnical engineering problems, and it is more and more widely used in the prediction of mine roadway support effect. However, comparing previous numerical simulation results with practical results, it is found that the additional stress field stress generated by bolt prestress in roadway support generally differs by a large order of magnitude from the original rock stress field value of the roadway. The additional stress field generated by the anchor bolt prestress is much smaller than the original rock stress. Therefore, it is impossible to simulate the stress field generated by the prestress of the anchor rod and cable under the condition of the original rock stress. Therefore, in order to better visualize the compressive stress concentration area around the roadway under the prestressing action of the bolt and anchor cable combined support, firstly, the distribution state of the bolt prestress in the surrounding rock of the roadway is carried out under the non-original rock stress. After completing the simulation, the original rock stress, vertical stress and horizontal stress were added to the model. Where бx = бy = 37MPa, бz = 31MPa. After comparison, a simulation conclusion is drawn. On-site monitoring of roadway separation found that this simulation method has less error and more accurately simulates the effect of roadway support.

Citation Download Citation

Jie Li, Xinghua Li, and Fuguang Liu "FLAC^3D simulation application of roadway support effect under non-original rock stress", Proc. SPIE 12256, International Conference on Electronic Information Engineering, Big Data, and Computer Technology (EIBDCT 2022), 122562V (6 May 2022); https://doi.org/10.1117/12.2635427

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KEYWORDS

Numerical simulations

Computing systems

3D modeling

Land mines

Lithium

Mining

Error analysis

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