Study on water-rock interaction failure mechanism and constitutive model of mudstone damaged by pre-peak disturbance
文献类型：期刊论文
| 作者 | Qin, Hui1,3; Tang, Hua1,3; Yin, Xiaotao1,3; Cheng, Xu1,3; Li, Jiayi2 |
| 刊名 | THEORETICAL AND APPLIED FRACTURE MECHANICS
 |
| 出版日期 | 2024-10-01 |
| 卷号 | 133页码:15 |
| 关键词 | Damage mudstone Water-rock interaction Failure mechanism Pre-peak damage variable Damage constitutive model |
| ISSN号 | 0167-8442 |
| DOI | 10.1016/j.tafmec.2024.104539 |
| 英文摘要 | The mudstone disturbed by engineering has been damaged to varying degrees before the peak strength, which is often ignored in the existing research. To reveal the failure mechanism and mechanical characteristics of mudstone under the combined action of water and damage. Firstly, this study proposed a pre-peak damage variable (Da) to characterize the degree of damage before peak stress. Then, triaxial tests were conducted to assess the mechanical properties under different Da and the water-rock interaction. The failure mechanisms of mudstone were revealed from both macro and micro perspectives. Finally, a statistical damage constitutive model for mudstone was constructed, and the rationality of the model was verified using experimental results. The results indicate: (1) The reduction of strength parameters caused by engineering disturbance and water rock coupling is the main reason for the instability of mudstone slope after construction. (2) Mudstone strength decreases gradually and then sharply with increasing Da. The Da reduces mudstone strength by 10%-20% on the original conditions. The Da firstly reduces the cohesion, and then the friction angle. (3) The undamaged mudstone mainly exhibits a multiple-failure-plane mode, while damaged mudstone consists of a single-failureplane mode. The reason is that the damage zone of mudstone is more likely to infiltrate water molecules, leading to lubrication and softening of the mineral particle skeleton, resulting in a single fracture surface failure mode. (4) The constitutive model for mudstone considering the water weakening and Da effectively describes the stress-strain relationship of damaged mudstone under the water-rock interaction. The research provides new insights into the evolution of soft rock damage considering disturbances and water weakening. |
| 资助项目 | Key R & D Program of Yunnan, China[202303AA080010] ; Science and Technology Innovation and Demonstration Project of Yunnan Provincial Department of Transportation[98] |
| WOS研究方向 | Engineering ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001345345800001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/43015]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Tang, Hua |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Yunnan Univ, Sch Architecture & Planning, Kunming 650091, Yunnan, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qin, Hui,Tang, Hua,Yin, Xiaotao,et al. Study on water-rock interaction failure mechanism and constitutive model of mudstone damaged by pre-peak disturbance[J]. THEORETICAL AND APPLIED FRACTURE MECHANICS,2024,133:15. |
| APA | Qin, Hui,Tang, Hua,Yin, Xiaotao,Cheng, Xu,&Li, Jiayi.(2024).Study on water-rock interaction failure mechanism and constitutive model of mudstone damaged by pre-peak disturbance.THEORETICAL AND APPLIED FRACTURE MECHANICS,133,15. |
| MLA | Qin, Hui,et al."Study on water-rock interaction failure mechanism and constitutive model of mudstone damaged by pre-peak disturbance".THEORETICAL AND APPLIED FRACTURE MECHANICS 133(2024):15. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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