Displacement of surrounding rock in a deep circular hole considering double moduli and strength-stiffness degradation
| العنوان: | Displacement of surrounding rock in a deep circular hole considering double moduli and strength-stiffness degradation |
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| المؤلفون: | Weiming Wang, Zenghui Zhao, Wei Sun, Shaojie Chen, Yuanhui Feng |
| المصدر: | Applied Mathematics and Mechanics. 41:1847-1860 |
| بيانات النشر: | Springer Science and Business Media LLC, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Stress field, Dilatant, Stiffness degradation, Circular hole, Partial differential equation, Materials science, Mechanics of Materials, Applied Mathematics, Mechanical Engineering, Drop (liquid), Modulus, Mechanics, Moduli |
| الوصف: | The problem of cavity stability widely exists in deep underground engineering and energy exploitation. First, the stress field of the surrounding rock under the uniform stress field is deduced based on a post-peak strength drop model considering the rock’s characteristics of constant modulus and double moduli. Then, the orthogonal non-associative flow rule is used to establish the displacement of the surrounding rock under constant modulus and double moduli, respectively, considering the stiffness degradation and dilatancy effects in the plastic region and assuming that the elastic strain in the plastic region satisfies the elastic constitutive relationship. Finally, the evolution of the displacement in the surrounding rock is analyzed under the effects of the double moduli characteristics, the strength drop, the stiffness degradation, and the dilatancy. The results show that the displacement solutions of the surrounding rock under constant modulus and double moduli have a unified expression. The coefficients of the expression are related to the stress field of the original rock, the elastic constant of the surrounding rock, the strength parameters, and the dilatancy angle. The strength drop, the stiffness degradation, and the dilatancy effects all have effects on the displacement. The effects can be characterized by quantitative relationships. |
| تدمد: | 1573-2754 0253-4827 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::16468ff25e0f9bd3d060b5a53b3bd819 https://doi.org/10.1007/s10483-020-2665-9 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........16468ff25e0f9bd3d060b5a53b3bd819 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 15732754 02534827 |
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