考虑剪切的常规态近场动力学模型及岩体裂隙扩展
演化规律研究

金属矿山 ›› 2024, Vol. 53 ›› Issue (2): 123-.

考虑剪切的常规态近场动力学模型及岩体裂隙扩展演化规律研究

冯　强¹　徐龙威¹刘炜炜¹　赵子栋¹　孙尚渠¹　张　强²

1. 山东科技大学土木工程与建筑学院,山东青岛 266590;2. 中国矿业大学力学与土木工程学院,江苏徐州 221116

出版日期:2024-02-15 发布日期:2024-04-03
基金资助:
国家自然科学基金项目(编号:52074269);山东省自然科学基金项目(编号:ZR2023MD099)。

Study on the Conventional State-type Peridynamics Model Considering Shear Deformation and the Evolution Law of Rock Fracture Propagation

FENG Qiang¹　XU Longwei¹　LIU Weiwei¹　ZHAO Zidong¹　SUN Shangqu¹　ZHANG Qiang²

1. College of Civil Engineering and Architecture,Shandong University of Science and Technology,Qingdao 266590,China; 2. School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,China

Online:2024-02-15 Published:2024-04-03

摘要/Abstract

摘要： 岩体中复杂的裂隙结构严重影响了工程岩体的稳定性及破坏形态,开展其对裂隙岩体损伤破坏模式影响的研究具有重要的理论意义和工程价值。本文基于常规态型近场动力学(OSB-PD)理论构建了考虑剪切变形的改进型OSB-PD 模型,并基于构建的考虑剪切变形的OSB-PD 模型开展了裂隙岩体在单轴压缩条件下的裂纹扩展演化规律研究;提出了一种新的岩石非均质性模拟方法,重点研究了岩石的非均质性对不同预制裂隙角度下岩石裂纹扩展行为的影响。结果表明,预制裂隙角度对于含裂隙岩石裂纹扩展具有较大影响,且岩石的非均质性将大幅度地提升裂纹扩展速度。

关键词: 剪切变形　裂隙扩展　近场动力学　质点偏移法　非均质性

Abstract: The complex fracture structure in rock mass seriously affects the stability and failure mode of engineering rock mass. It is of great theoretical significance and engineering value to study its influence on the damage and failure mode of fractured rock mass. An improved OSB-PD model considering shear deformation is constructed based on the conventional state-type peridynamics ( OSB-PD ) theory,and the crack propagation evolution law of fractured rock mass under uniaxial compression is studied based on the constructed OSB-PD model considering shear deformation. A new simulation method of rock heterogeneity is proposed,and the influence of rock heterogeneity on the crack propagation behavior of rock under different prefabricated crack angles is studied. The results show that the prefabricated crack angle has a great influence on the crack propagation of fractured rock,and the heterogeneity of rock will greatly increase the crack propagation speed.

Key words: shear deformation,fracture propagation,peridynamics,particle migration method,heterogeneity

冯　强, 徐龙威, 刘炜炜, 赵子栋, 孙尚渠, 张　强. 考虑剪切的常规态近场动力学模型及岩体裂隙扩展演化规律研究[J]. 金属矿山, 2024, 53(2): 123-.

FENG Qiang, XU Longwei, LIU Weiwei, ZHAO Zidong, SUN Shangqu, ZHANG Qiang. Study on the Conventional State-type Peridynamics Model Considering Shear Deformation and the Evolution Law of Rock Fracture Propagation[J]. Metal Mine, 2024, 53(2): 123-.

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