CHINA MINE ENGINEERING

A mathematical model is established for the stress and seepage of a coal mine underground reservoir dam based on coupled hydraulic equations and basic equations of elasticity. The model is imported into COMSOL Multiphysics to analyze the evolution rules of water seepage height and safety factor of the dam as the change of water depth in the reservoir, and study the effect of different water depth on the stability of the dam. The results show that as the increase of water depth, the water seepage height is raised and the safety factor is decreased, which is unfavorable for the stability of the dam.