关键词:
Modelling experiment
Non-intrusive finite difference
Numerical simulation
Random seepage field
摘要:
One of the critical factors in assessing the stability of tailings dams is the seepage field within the dam body. This study analyzed the spatial variability of the permeability coefficient on the Luomukeng tailings pond in Jiangxi, China and its effect on the seepage field. The research employed a heap dam model test, an internal permeability coefficient test, and three-dimensional numerical simulation methods. Specifically, we investigated the seepage field using a non-invasive stochastic finite element approach with a 3D random field model and a 3D deterministic model in response to reservoir water level rise. Results indicate that pore water pressure curves derived from the random field model align more closely with the test results of the heap dam model as the water level increases. The correlation coefficients between the random field model and the monitoring data (ranging from 0.984 to 0.874) surpass those of the deterministic model (ranging from 0.916 to 0.768). Compared to the deterministic model, the variations in pore water pressure predicted by the random field model are more consistent with experimental values. Furthermore, the three-dimensional numerical simulation of the permeability coefficient using the random field model more accurately reflects the seepage characteristics of the tailings dam slope, thereby providing a more realistic representation of actual seepage conditions.