Numerical Simulation and Experiment on the Dust Movement at Top Caving Mining Face

Discrete mathematical model of dust grain is established based on theory of gas-solid flow. Software Fluent is used to simulate dust movement at 3309 top caving mining face of Chengzhuang coal mine. Different dust distribution rules during cutting coal, removing hydraulic support and caving top coal are obtained from the simulation. Simulation results showed that the dust concentration was different, and so was the location of maximum dust concentration and area of respirable dust. Experiment was performed and the experimental results tally with simulation results. The numerical simulation is reliable and can be used as theoretical guide for developing dust prevention measures.