岩土力学 ›› 2022, Vol. 43 ›› Issue (6): 1533-1545.doi: 10.16285/j.rsm.2021.2120

• 基础理论与实验研究 • 上一篇    下一篇

非贯通节理花岗岩剪切断裂力学特性及 声发射特征研究

王刚1, 2, 3,宋磊博1, 3,刘夕奇2,包春燕1, 3,吝曼卿4,刘广建1, 3   

  1. 1. 绍兴文理学院 土木工程学院,浙江 绍兴 312000;2. 武汉大学 土木建筑工程学院,湖北 武汉 430070; 3. 绍兴文理学院 浙江省岩石力学与地质灾害重点实验室,浙江 绍兴 312000;4. 武汉工程大学 资源与安全工程学院,湖北 武汉 430070
  • 收稿日期:2021-12-16 修回日期:2022-04-12 出版日期:2022-06-21 发布日期:2022-06-30
  • 通讯作者: 宋磊博,男,1989年生,博士,讲师,主要从事岩体结构面力学性质与剪切强度等方面的研究工作。E-mail: song_leibo@163.com E-mail:gangw277842@whut.edu.cn
  • 作者简介:王刚,男,1989年生,博士,讲师,主要从事岩石力学及地下工程等方面的研究工作。
  • 基金资助:
    国家自然科学基金(No.42002275,No.51504167);浙江省自然科学基金(No.LQ21D020001);中国博士后科学基金(No.2021M692319);浙江省山体地质灾害防治协同创新中心开放研究基金(No.PCMGH-2021-03)。

Shear fracture mechanical properties and acoustic emission characteristics of discontinuous jointed granite

WANG Gang1, 2, 3, SONG Lei-bo1, 3, LIU Xi-qi2, BAO Chun-yan1, 3, LIN Man-qing4, LIU Guang-jian1, 3   

  1. 1. School of Civil Engineering, Shaoxing University, Shaoxing, Zhejiang 312000, China; 2. School of Civil Engineering, Wuhan University, Wuhan, Hubei 430070, China; 3. Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province, Shaoxing University, Shaoxing, Zhejiang 312000, China; 4. School of Resources and Safety Engineering, Wuhan Institute of Technology, Wuhan, Hubei 430070, China
  • Received:2021-12-16 Revised:2022-04-12 Online:2022-06-21 Published:2022-06-30
  • Supported by:
    This work was supported by the National Natural Science Foundation of China(42002275, 51504167), the Natural Science Foundation of Zhejiang Province (LQ21D020001), the China Postdoctoral Science Foundation (2021M692319) and the Collaborative Innovation Center for Prevention and Control of Mountain Geological Hazards of Zhejiang Province(PCMGH-2021-03).

摘要: 为探究节理岩体在压剪复合作用下的断裂力学行为与破坏机制,采用完整及非贯通节理花岗岩开展了剪切试验,从宏观力学特性、声发射信号特征、颗粒流细观演化规律等多角度进行解析,并提出了一种利用声发射信号特征及其关键信息点预判花岗岩剪切破坏的方法。研究结果表明:节理破坏了岩石完整性,降低了岩石的剪切刚度和峰值剪切强度;此外,节理的存在会影响裂纹的扩展路径和破坏模式,且这种影响会随着法向应力的增加而削弱。法向应力和节理对声发射特征点影响显著,声发射信号的缓慢增长及b值的持续下降可作为岩石剪切破坏的前兆特征;利用声发射信号特征及其关键信息点可以有效预判花岗岩的剪切失稳破坏过程。该研究成果为节理岩体剪切破坏机制分析及其稳定性预测提供了一定参考。

关键词: 岩石力学, 非贯通性节理, 花岗岩, 声发射特征, 破坏机制

Abstract: To investigate the fracture mechanical behavior and failure mechanism of jointed rock mass under compression and shear load, shear tests were carried out on intact and discontinuous jointed granite. The macroscopic mechanical properties, acoustic emission signal characteristics and mesoscopic evolution law by particle flow simulation were analyzed through the experiment. A method predicting shear failure of granite was proposed by using the acoustic emission signal characteristics and its key information points. The results show that the rock integrity is damaged by the joint, and the shear modulus and peak shear strength of the rock are reduced. In addition, the existence of joints will affect the propagation path and failure mode of cracks, and the influence will be weakened with the increase of normal stress. The normal stress and joints have significant effects on the acoustic emission characteristic points. The slow growth of acoustic emission signal and the continuous decline of b value can be used as the precursor characteristics of rock shear failure. The acoustic emission signal characteristics and its key information points can be used to effectively predict the shear failure process of granite. The research results provide a reference for the shear failure mechanism analysis and stability prediction of jointed rock mass.

Key words: rock mechanics, discontinuous joint, granite, acoustic emission, failure mechanism

中图分类号: TU45
[1] 黄曼, 宁昊晟, 洪陈杰, 陶志刚, 刘雨星, 张贺, . 基于第二代负泊松比锚杆加固的充填结构面剪切特性研究[J]. 岩土力学, 2025, 46(S1): 131-140.
[2] 杨烜宇, 王勇, . 考虑不同凸起体宽度的规则形态土−岩界面剪切试验研究[J]. 岩土力学, 2025, 46(S1): 195-204.
[3] 刘一鸣, 李振, 冯国瑞, 杨鹏, 白锦文, 黄炳雄, 李东, . 循环加卸载下裂隙砂岩声−热响应特征及前兆规律[J]. 岩土力学, 2025, 46(9): 2773-2791.
[4] 李晓锋, 李海波, 刘黎旺, 傅帅旸, . 冲击荷载作用下岩石动态拉伸破坏特征及细观机制[J]. 岩土力学, 2025, 46(8): 2387-2398.
[5] 吕萌, 王亮清, 谢妮, 朱林锋, 安彩龙, 柯睿, 王旭晨, . 加锚异性结构面剪切特性及声发射响应特征研究[J]. 岩土力学, 2025, 46(7): 2106-2120.
[6] 倪祖甲, 乔江美, 张俊楷, 唐旭海, . 基于微观岩石力学试验及精确矿物晶体建模的砂岩力学性质及波速分析[J]. 岩土力学, 2025, 46(6): 1865-1880.
[7] 高品红, 高晨博, 彭成威, 刘飞禹, . 降雨作用下花岗岩残积土边坡模型试验及离散元分析[J]. 岩土力学, 2025, 46(5): 1632-1642.
[8] 张艳博, 周浩, 梁鹏, 姚旭龙, 陶志刚, 来有邦, . 基于到时精确拾取与智能优化算法结合的岩石声发射定位方法研究[J]. 岩土力学, 2025, 46(5): 1643-1656.
[9] 尚召伟, 孔令伟, 鄢俊彪, 高志傲, 王斐, 黎澄生, . 非饱和花岗岩残积土的小应变剪切模量特性与其持水特征曲线确定方法[J]. 岩土力学, 2025, 46(4): 1131-1140.
[10] 马语航, 何明明, 李宁, . XCY-2旋切触探系统研发及应用[J]. 岩土力学, 2025, 46(3): 1025-1038.
[11] 薛熠, 杨博鹍, 刘勇, 孙强, 张云, 曹正正, . 液氮循环冷冲击作用下高温花岗岩I型断裂特性研究[J]. 岩土力学, 2025, 46(2): 422-436.
[12] 李利萍, 余泓浩, 李秋雨, 潘一山, . 含水煤块超低摩擦效应试验研究[J]. 岩土力学, 2025, 46(10): 3093-3103.
[13] 田雷, 谢强, 段军, 陶富涛, 班宇鑫, 傅翔, 晏彬淇, . 三向斜锚短桩基础拉拔荷载作用下桩锚节点的受力特性分析[J]. 岩土力学, 2025, 46(1): 278-288.
[14] 孙杰豪, 郭保华, 田世轩, 程坦, . 基于声发射特征参数的砂岩节理直剪破坏特征试验研究[J]. 岩土力学, 2024, 45(S1): 167-177.
[15] 周长冰, 闫俊豪, 李小双, . 花岗岩热破裂裂隙动态演化特性数值模拟研究[J]. 岩土力学, 2024, 45(S1): 694-704.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!