Academic Journal
Non-uniform failure mechanism and stability control of mining roadway under deviatoric stress field
| Title: | Non-uniform failure mechanism and stability control of mining roadway under deviatoric stress field |
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| Authors: | Tianhong Huo, Hongtao Liu, Shigen Fu, Botao Fu, Shouyin Wang |
| Source: | Scientific Reports, Vol 15, Iss 1, Pp 1-16 (2025) |
| Publisher Information: | Nature Portfolio, 2025. |
| Publication Year: | 2025 |
| Collection: | LCC:Medicine LCC:Science |
| Subject Terms: | Surrounding rock control, Butterfly plastic zone, Deviatoric stress field, Second invariant of deviatoric stress, Roadway, Medicine, Science |
| More Details: | Abstract Based on the elastic–plastic theory, the analytical formula of the second invariant J 2 of deviatoric stress at any point around the circular roadway under the non-uniform stress field is derived. The distribution law of J 2 of surrounding rock under the three-dimensional non-isobaric stress field is studied by theoretical analysis and numerical simulation. Combined with the butterfly failure theory of surrounding rock of roadway, the close relationship between the distribution pattern of J 2 and the distribution pattern of plastic zone is found, and the failure mechanism of surrounding rock is revealed. The results show that the distribution form of the second invariant J 2 of deviatoric stress is closely related to the distribution form of plastic zone. When the distribution of J 2 of surrounding rock shows ‘round’, ‘oval’ and ‘butterfly’, the plastic zone shows the corresponding consistent form. When the second invariant J 2 of deviatoric stress produces stress concentration, the surrounding rock of roadway will produce large-scale damage. When the stress concentration is high, it may lead to malignant expansion of surrounding rock of roadway. The distribution of the second invariant J 2 of deviatoric stress is directional. When the principal stress rotates over a certain angle, the second invariant J 2 of deviatoric stress rotates over the same angle as the plastic zone. Under the influence of superimposed mining, the second invariant deviatoric stress J 2 of the wind tunnel of Yangchangwan 160,206 working face presents butterfly distribution, and the stress butterfly leaves present a certain degree of rotation. Based on the failure mode of plastic zone, the corresponding optimization support scheme is proposed, and the engineering effect is good. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 2045-2322 |
| Relation: | https://doaj.org/toc/2045-2322 |
| DOI: | 10.1038/s41598-024-83355-x |
| Access URL: | https://doaj.org/article/d91b13b3788547548b41884cada864c0 |
| Accession Number: | edsdoj.91b13b3788547548b41884cada864c0 |
| Database: | Directory of Open Access Journals |
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| ISSN: | 20452322 |
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| DOI: | 10.1038/s41598-024-83355-x |
| Published in: | Scientific Reports |
| Language: | English |