Abstract
According to the characteristics of comprehensive mechanized heading face, established the mathematical model of single-phase air flow with k-e two equations model, and have established k-e-Θ-kp mathematic model to solve two-phase flow of gas and particles in dust space with eulerian-eulerian method and eulerian-lagrangian method. Numerical solution of gas-particle two-phase flow was put forward based on collocated grid SIMPLE algorithm. Moreover, numerical simulation of dust concentration in fully mechanized caving face was carried out by using Fluent software. Finally, when in forced-exhaust ventilation circumstance, drawer type fan drum have less dust absorption, and most of dust spread to the other site; the dust concentration is inversely proportional to the distance from tunneling head, and the dust concentration has already diffused to decrease below 102 mg/m 3 at the position of x=12 m. Dust are more focused on relative side(in the range about y from 0 to 2 meter) of roadway space of press-ventilated fan drum, especially between tunneling place and drawer type fan drum; the road- way with road header have a higher dust concentration. These conclusions provide reliable theory basis for the dust prevention in comprehensive mechanized heading face.
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