Abstract: Taken the backfill area of caving mining of Jinshandian iron mine as the example, the mathematical model for seepage and stress coupling in backfill area of caving mining was set up, coupling characteristics of seepage and stress field were analyzed. Simulation results indicate that seepage velocity is higher around laneway, seepage quantity through laneway boundary is 1.3×10-3 m³/（s·m）. Compared with uncoupled condition, the value of the whole head of coupled condition is reduced totally, and the influence is much obvious especially in the bottom area. Coupling has certain influence to stress field. Whole head value reduces gradually with the increasing of coupling coefficient β.

Key words: Caving mining, Backfilling, Seepage field, Stress field, Coupling, Finite element