Based on the case of coal mining under Jinsha River in Gansu Province,and focused on the anti-seepage control of the mining disturbed riverbed,by making use of surface movement monitoring and discrete element numerical simulation,the study revealed the regularity of surface movement,the failure characteristics of strata and the percolation path induced by mining underneath the river.A flexible anti-seepage scheme,Four Element Structure(FES),was put forward,which can harmonize and buffer the mining induced d...