ANISOTROPY AND DIRECTIONAL DEPENDENCY IN CORE FRACTURING: 3D STRUCTURE AND FRACTAL ANALYSIS

Rock fissure structure has an important impact on geological engineering, resource extraction, and disaster prevention. This study used computed tomography (CT) scanning and fractal theory to examine the spatial distribution, shape, and development of rock fissures. The results show significant variations in rupture forces and fracture patterns among the samples. Fractures typically start at the edges and move inward, forming patterns linked to the samples’ initial conditions. The evolution of fractal dimensions and pore-fracture ratios in the XY, XZ, and YZ directions reveals the complexity and orientation dependence of fracturing. Sample 6 has more fractures at both ends in the XY direction, while Sample 7 is asymmetric in the XZ direction. Samples 1, 2, 7, and 8 are approximately symmetric in the YZ direction, highlighting the impact of spatial orientation on fracture behavior. The relationship between fractal dimension and the increasing number of pore-fractures can help predict the evolution of fractures and pores with depth. These findings are crucial for understanding the mechanical behavior of rock cores and fracture development patterns in rock materials.