Graph theoretical analysis of limestone fracture network damage patterns based on uniaxial compression test  

在线阅读下载全文

作  者:Mingyang Wang Congcong Wang Enzhi Wang Xiaoli Liu Xiao Li 

机构地区:[1]State Key Laboratory of Hydro-science and Engineering,Tsinghua University,Beijing,100084,China [2]Department of Automation,Tsinghua University,Beijing,100084,China [3]Beijing Huairou Laboratory,Beijing,101400,China [4]Institute of Geology and Geophysics,Chinese Academy of Science,Beijing,100029,China

出  处:《Journal of Rock Mechanics and Geotechnical Engineering》2024年第9期3485-3510,共26页岩石力学与岩土工程学报(英文版)

基  金:supported by the National Natural Science Foundation of China(Grant No.52090081);the State Key Laboratory of Hydroscience and Engineering(Grant No.2022-KY-02).

摘  要:The topological attributes of fracture networks in limestone,subject to intense hydrodynamics and intricate geological discontinuities,substantially influence the mechanical and hydraulic characteristics of the rock mass.The dynamical evolution of fracture networks under stress is crucial for unveiling the interaction patterns among fractures.However,existing models are undirected graphs focused on stationary topology,which need optimization to depict fractures'dynamic development and rupture process.To compensate for the time and destruction terms,we propose the damage network model,which defines the physical interpretation of fractures through the ternary motif.We focus primarily on the evolution of node types,topological attributes,and motifs of the fracture network in limestone under uniaxial stress.Observations expose the varying behavior of the nodes'self-dynamics and neighbors'adjacent dynamics in the fracture network.This approach elucidates the impact of micro-crack behaviors on large brittle shear fractures from a topological perspective and further subdivides the progressive failure stage into four distinct phases(isolated crack growth phase,crack splay phase,damage coalescence phase,and mechanical failure phase)based on the significance profile of the motif.Regression analysis reveals a positive linear and negative power correlation between fracture network density and branch number to the rock damage resistance,respectively.The damage network model introduces a novel methodology for depicting the interaction of two-dimensional(2D)projected fractures,considering the dynamic spatiotemporal development characteristics and fracture geometric variation.It helps dynamically characterize properties such as connectivity,permeability,and damage factors while comprehensively assessing damage in rock mass fracture networks.

关 键 词:MOTIF Fracture network Topological property Damage resistance LIMESTONE 

分 类 号:TU45[建筑科学—岩土工程]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象