Numerical Simulation Investigation on Water-sand Mixture Flow through a Single Fracture

摘要

Quicksand is a hazard that water-sand mixture pours into underground space through a pathway and causes financial loss or even casualties. When the fractures connect sand aquifers and underground space, the water and sand will flow into underground space s under hydraulic head and gravity. Numerical simulation of water-sand flow through one single straight fracture is conducted in this paper using DEM-CFD method. The results show that the sand mass flow rate has a positive linear relationship with fracture width and a 1.5 powder relationship with fracture aperture when water-sand mixture transport through a straight flat fracture is in the stable stage.