Study on construction method of three-dimensional numerical model of coal with fracture structure
ZHANG Zixin
YU Yang
YU Jiandong
NIU Zengjie
LANG Ding
ZHANG Yao
Abstract：There are a large number of fracture structures with different forms in coal and rock mass,which indirectly affect and de-termine the mechanical properties of coal and rock mass.It is necessary to accurately grasp fracture structure and reconstruct 3D nu-merical model to stucly mechanical properties of coal and rock mass.The threshold segmentation of coal sample slices is carried out by using the combined methods of CT scanning,rock mechanics experiment,image processing technology and RFPA3D-CT to ex-tract the three-dimensional fracture structure of coal sample,establish a three-dimensional numerical model that is basically consistent with the internal fracture structure and mechanical properties of the studied coal sample,and embed RFPA3D-CT for uniaxial loading numer-ical simulation analysis.The results show that:the three-dimensional numerical model of coal sample can reflect the complex intern-al micro-fracture structure well.The uniaxial compression test and numerical simulation test have strong similarities in failure morphology and stress-strain curves,and the average error of uniaxial compressive strength and elastic modulus is only 1.56%and 2.22%respectively.Finally,the correctness of the construction method of three-dimensional numerical model of coal sample is verified.
Keywords：CT scanningimage processingCoal fissure structuremesoscopic parametersthree-dimensional numerical model
Publication Date：2025-04-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：11( 155-165 )