Analysis on the Characteristics of Water Pollution Caused by Underground Mining and Research Progress of Treatment Technology

Summary: The evolution of mining-induced stress field in longwall panel is closely related to the fracture field and the breaking characteristics of strata. A large-scale physical model was constructed to investigate its evolution and theoretical analysis was used to reveal the mechanism of stress distribution in the overburden. The modelling results showed that the major principal stress field is arch-shaped, with stress concentration particularly on both shoulders of the arch-shaped structure, and that the trajectories of principal stress determine the fracture morphology.