Title:

Study on the freeze-thaw damage characteristics of skarn based on CT three-dimensional reconstruction

Group publication title:

Mining Science

Creator:

Shao, Zhixin ; Song, Yanqi ; Shen, Fuxin ; Ma, Hongfa ; Zheng, Junjie ; Yang, Juntao

Subject and Keywords:

mining ; geology ; geo-engineering

Description:

Mining Science, Vol. 31, 2024, s. 39-59

Abstrakt:

To study the mesoscopic damage evolution characteristics of skarn under freeze-thaw cycles, based on CT technology, the skarn samples under freeze-thaw action were scanned by CT, and the image data of skarn were segmented by Avizo software. The digital model of the three-dimensional structure of skarn was established, and the evolution law of the internal structure of skarn during the freeze-thaw cycle was quantitatively analyzed. The box dimension algorithm calculates the fractal dimension of the pore structure under freeze-thaw conditions. The relationship between fractal dimension, pore volume fraction, and freeze-thaw cycles was studied. According to the statistical results of the pore size distribu-tion of skarn, the change characteristics of pore structure in the rock under the influence of freeze-thaw were studied. Based on the theory of rock damage mechanics, the damage variable of skarn was defined using the concept of the effective bearing zone, and the freeze-thaw damage evolution of skarn was studied. The results show that the three-dimensional reconstructed model can directly show each medium’s meso-pore structure and spatial distribution. There is a positive correlation between pore volume fraction and fractal dimension under freeze-thaw conditions. The fractal dimension satisfies the exponential growth law. The skarn damage variable increases with the increase of freeze-thaw cycles, which is consistent with the development trend of pore structure. The exponential function can better reflect the damage evolution of skarn under freezing and thawing.

Publisher:

Wroclaw University of Technology

Place of publication:

Wrocław

Date:

2024

Resource Type:

journal

Resource Identifier:

doi:10.37190/msc243103

Source:

click here to follow the link

Language:

eng

Relation:

Mining Science ; Mining Science, Vol. 31, 2024 ; Prace Naukowe Instytutu Gornictwa Politechniki Wroclawskiej ; Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii

Rights:

Pewne prawa zastrzeżone na rzecz Autorów i Wydawcy

Access Rights:

Dla wszystkich zgodnie z licencją

License:

CC BY-NC 3.0 ; click here to follow the link

Location:

Wroclaw University of Technology