Numerical Simulation of Subdam Settlement in Ash Disposal Based on CGSW Optimization

The stacking of impermissible materials in the disposal dry fly ash is unprecedented last 40 years power plant management China, and their effect on stability whole facility uncertain. Due to lack relevant treatment experience, a more comprehensive method such as numerical modeling must be adopted for final design. This paper set up borehole database from geological logging data obtain distribution coal gangue solid waste. Then, it established an accurate three-dimensional mesh model through Rhino. Based elastic–plastic mechanics, finite difference code Flac3D 6.0 was employed study risk dam foundation. A comparative analysis influence displacement composite foundation subdam deformation differential subsidence conducted. simulation revealed that showed best reductions: 70.57% shear failure, 97.83% tension 22.63% maximum subsidence. Ultimately, optimum stone column diameter 0.5 m spacing 6 were proposed due standard deviation.