应力-渗流耦合效应下煤矿地下水库坝体稳定性研究

Study on the Stability of Coal Mine Underground Reservoir Dam Under the Coupling Action of Stress and Seepage

通过耦合水力学方程和弹性力学基本方程,建立了煤矿地下水库坝体应力-渗流数学模型,将其导入COMSOL Multiphysics软件中分析煤矿地下水库坝体的渗透高度和安全系数随储水深度的演变规律。通过COMSOL Multiphysics研究不同储水深度对煤矿地下水库坝体稳定性的影响。结果表明:提高储水深度会导致煤矿地下水库坝体渗透高度升高,安全系数降低,不利于坝体维持稳定。

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.