Tytuł:

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

Tytuł publikacji grupowej:

Mining Science

Autor:

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

Temat i słowa kluczowe:

górnictwo ; geologia ; geoinżynieria ; skarn rock ; freeze-thaw cycle ; CT scan experiment ; mesoscopic damage ; damage variable

Opis:

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.

Wydawca:

Wydział Geoinżynierii, Górnictwa i Geologii Politechniki Wrocławskiej

Miejsce wydania:

Wrocław

Data wydania:

2024

Typ zasobu:

artykuł

Identyfikator zasobu:

doi:10.37190/msc243103

Źródło:

kliknij tutaj, żeby przejść

Język:

eng

Powiązania:

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

Prawa:

Pewne prawa zastrzeżone na rzecz Autorów i Wydawcy

Prawa dostępu:

Dla wszystkich zgodnie z licencją

Licencja:

CC BY-NC 3.0 ; kliknij tutaj, żeby przejść

Lokalizacja oryginału:

Politechnika Wrocławska