Experimental Study on Shear Characteristics of Structural Plane with Different Fluctuation Characteristics
文献类型：期刊论文
| 作者 | Guo, Yintong; Ying, Qiqi; Wang, Duocai; Zhang, Hong; Huang, Famu; Guo, Haitao; Hou, Lei; Xu, Mingnan; Liu, Hejuan; Xia, Debin |
| 刊名 | ENERGIES
 |
| 出版日期 | 2022-10-01 |
| 卷号 | 15期号:20 |
| 关键词 | undulating angle structural plane normal stress shear rate shear characteristics |
| 英文摘要 | With the increasing scale and depth of underground engineering, the geological environment that engineering is faced with is becoming more complex. As the weak position of rock mass, the structural surface has a particularly great influence on the mechanical characteristics of the rock mass. In order to obtain the shear strength characteristic of the structural plane and analyze the influence of morphological parameters such as the undulating angle and bulge degree on shearing, taking medium-low permeability tight sandstone as the research object, four kinds of structural plane samples with different undulating angles (10, 20, 30 and 40 degrees) were prepared with a Python and high-precision engraving machine. Direct shear tests under different normal stresses (2, 4, 6 and 8 MPa) and shear rates (0.6, 1.2 and 2.4 mm/min) were performed, and the shear mechanical properties were analyzed. The structural surfaces before and after shearing were scanned using a high-precision three-dimensional scanner, so as to evaluate the roughness of the structural surface and determine the influence from various factors on the shear characteristics. The test results showed that for the structural plane with the same undulating angle, the peak shear stress increased approximately linearly with an increase in normal stress at a 0.6 mm/min shear rate and an increment speed of approximately 0.82, while the peak shear stress negatively correlated with the shear rate at a value of 4 MPa for normal stress. The larger the undulating angle was, the greater the influence of the shear rate (the shear stress decreased by 2.31 MPa at a 40 degrees angle). When the normal stress and the shear rate were fixed, the peak shear stress corresponding to the structural surface gradually increased with the increase in the undulating angle, and the maximum increment was 5.04 MPa at 4 MPa normal stress and a 0.6 mm/min shear rate. An analysis of the morphological characteristics of the structural plane showed that when the undulating angle (40 degrees) and the normal stress (6 and 8 MPa) were larger, the damage of the structural plane became more obvious, the shear point was closer to the tooth valley position, and the mechanical bite force and friction force of the structural plane were better utilized. When the shear rate was lower (0.6 mm/min), the friction characteristics of the shear surface were more visible, the shear was increasingly sufficient, and the corresponding shear strength was also greater. |
| 学科主题 | Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:000872650500001 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34960]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS 2.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS; |
| 推荐引用方式 GB/T 7714 | Guo, Yintong,Ying, Qiqi,Wang, Duocai,et al. Experimental Study on Shear Characteristics of Structural Plane with Different Fluctuation Characteristics[J]. ENERGIES,2022,15(20). |
| APA | Guo, Yintong.,Ying, Qiqi.,Wang, Duocai.,Zhang, Hong.,Huang, Famu.,...&Xia, Debin.(2022).Experimental Study on Shear Characteristics of Structural Plane with Different Fluctuation Characteristics.ENERGIES,15(20). |
| MLA | Guo, Yintong,et al."Experimental Study on Shear Characteristics of Structural Plane with Different Fluctuation Characteristics".ENERGIES 15.20(2022). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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