Crack initiation and propagation mechanism of borehole surrounding rock subjected to cyclic thermal loading: insights from theoretical solution and DEM simulation

Key Points

• Crack initiation occurs in surrounding rock, impacting overall stability under cyclic thermal loading.
• Significant deformation was noted under repeated cycles, indicating potential for large-scale instability.
• Analysis based on DEM simulation provides a detailed view of crack propagation mechanisms in various rock types.
• Further exploration is needed to ascertain long-term impacts of cyclic thermal loading on rock stability in real-world scenarios.