Study on seepage and deformation characteristics of coal microstructure by 3D reconstruction of CT images at high temperatures

• DOI: 10.1016/j.ijmst.2020.11.003
• Publication Date: 2020-12-17T06:21:55Z
• Authors: Gang Wang; Xiangjie Qin; Dongyang Han; Zhiyuan Liu
• Keywords: Coal; Mining engineering. Metallurgy; TN1-997; 0202 electrical engineering, electronic engineering, information engineering; Fluid-solid conjugate heat transfer; 02 engineering and technology; Pore-fracture structures; Thermal deformation

To study the seepage and deformation characteristics of coal at high temperatures, samples from six different regions were selected subjected to computed tomography (CT) scanning studies. In conjunction with ANSYS software, 3D reconstruction CT images was used for establishment fluid-solid conjugate heat transfer model thermal based on microstructures coal. addition, structure studied in 2D perspectives, followed by analysis temperatures. The results this indicated that porosity positively correlated fractal dimension, connectivity performances roughly identical perspectives. As increased, dimension became larger pore-fracture structures more complex. a result, permeability decreased. meantime, fluid fully heated, generating high-temperature water outlet. However, when low, outlet temperature very high. average skeleton temperatures showed trend initial increase subsequent decrease dimension. maximum but negatively