工程地质学报2024，Vol.32Issue(6)：2120-2129,10.DOI:10.13544/j.cnki.jeg.2022-0632
含钙质胶结结构面岩石的力学特性与破坏特征研究
STUDY ON MECHANICAL PROPERTIES AND FAILURE CHARACTERIS-TICS OF ROCK WITH CALCAREOUS CEMENTATION STRUCTURAL PLANE
摘要
Abstract
The stability of the engineering rock mass and nodal seepage are significantly influenced by the nodal shear expansion properties of the structure's surface rocks during cementation.By choosing structural faces with vari-ous angles while ensuring that the shear direction is consistent with the direction of the structural face,as well as by conducting indoor compression-shear tests and PFC numerical simulation tests,the mechanical characteristics and damage characteristics of the structural face rock with cementation effect are studied from macroscopic and fine viewpoints.The findings indicate that,assuming the structural surface is cemented:(1)The rock specimen is exten-sively shattered after damage,and the damage form is more complex when the structural surface does not correspond with the shear surface.(2)The angle α between the structural surface and the shear surface affects the shear strength of the rock specimen.When the angle α is between 0°and 60°,the rock exhibits its greatest shear strength,and when the angle α is between 60°and 90°,it reaches its maximum shear strength.(3)As the clamping angle αincreases,the shear displacement rises noticeably from the start of loading until the emergence of fractures.(4)The normal stress increases to encourage cemented part damage before the clamping angle α reaches 75°,and it increa-ses to limit cemented part damage after the clamping angle α reaches 75°.The concepts and techniques for the re-search can serve as a guide for analyzing the mechanical qualities and features of damage to structural surface rocks during cementation.关键词
胶结结构面/力学特性/破坏特征/剪切方向/PFC3DKey words
Cemented structural plane/Mechanical property/Failure characteristic/Shear direction/PFC分类
建筑与水利引用本文复制引用
王昊,陈俊智,冯豪天..含钙质胶结结构面岩石的力学特性与破坏特征研究[J].工程地质学报,2024,32(6):2120-2129,10.基金项目
国家自然科学基金项目(资助号:U1602232).This research is supported by the National Natural Science Foundation of China(Grant No.U1602232). （资助号:U1602232）
