Model of roughness discrete fractures network for uniaxial compressive test and its mechanical properties

WANG Pei-tao; REN Fen-hua; TAN Wen-hui; YAN Zhen-xiong; CAI Mei-feng; YANG Tian-hong.

doi:10.16285/j.rsm.2017.S1.008

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Model of roughness discrete fractures network for uniaxial compressive test and its mechanical properties

更新时间：2026-06-25

- Model of roughness discrete fractures network for uniaxial compressive test and its mechanical properties
- Vol. 38, Issue S1, Pages: 70-78(2017)
- 作者机构：
  
  1. 北京科技大学金属矿山高效开采与安全教育部重点实验室,北京,100083
  2. 北京科技大学土木与资源工程学院,北京,100083
  3. 东北大学深部金属矿山安全开采教育部重点试验室,辽宁,沈阳,110819
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2017.S1.008
  CLC： TU452
- Online First：05 June 2018，
  
  Published：2017
- 稿件说明：
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WANG Pei-tao, REN Fen-hua, TAN Wen-hui, et al. Model of roughness discrete fractures network for uniaxial compressive test and its mechanical properties[J]. 2017, 38(S1): 70-78.
DOI：

WANG Pei-tao, REN Fen-hua, TAN Wen-hui, et al. Model of roughness discrete fractures network for uniaxial compressive test and its mechanical properties[J]. 2017, 38(S1): 70-78. DOI： 10.16285/j.rsm.2017.S1.008.

摘要

针对岩体中随机结构面存在粗糙特性的特点，开展了粗糙离散节理网络(roughness discrete fractures network

RDFN)模型研究。采用数字图像处理技术，开发了生成RDFN模型的算法，并基于Matlab方法建立了与颗粒流离散元PFC方法的接口。采用颗粒流PFC方法研究粗糙度对RDFN模型单轴压缩下的弹性、强度和破坏模式的影响规律，并与直线型DFN模型进行对比。结果表明，RDFN模型的弹性模量低于DFN模型，而峰值强度较高，残余强度较低；DFN模型中微裂纹沿节理方向贯通，局部存在基岩内部裂纹扩展；RDFN模型由破坏模式相对复杂，达到峰值强度后基岩发生显著破坏。

Abstract

A roughness discrete fractures network(RDFN) model is proposed considering the complex and roughness geometry distribution of discontinuities in jointed rock masses. The digital image processing technique is firstly used to generate RDFN images using Matlab code. Then a RDFN model based on particle flow code(PFC) is established and the corresponding mechanical behaviors under uniaxial compression

such as elasticity

strength and failure pattern

are studied and compared with the traditional linear discrete fractures network (DFN) model. The results show that the elastic modulus of RDFN model is lower than that of DFN model. The peak strength of RDFN model is higher

and residual strength is lower. Microcracks in DFN model mainly coincided along the linear joints and partial intact rocks are fractured. The failure pattern of RDFN model is

however relatively much more complex with more fractured intact rocks after peak strength.

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