A Numerical Simulation Method of Flour Dust Trajectory in Fully Mechanized Caving Work

Abstract

The invention belongs to the technical field of research on the movement track of working flour dust in the field of production, and relates to a numerical simulation method for the movement track of fully mechanized working flour dust. First, according to the velocity distribution law of the viscous bottom layer in fluid mechanics and the Nicholas experimental empirical formula, the method is derived The velocity distribution formula of the viscous bottom layer of the fully mechanized caving face is obtained; secondly, the wind flow state is judged according to the average velocity value of the air flow at the entrance section of the fully mechanized caving face, and the self-defined function of the wind speed at the entrance section of the fully mechanized caving face is written in C language according to different flow states; finally Interpret the self-defined function of the wind speed at the inlet section of the fully mechanized caving face in FLUENT software, and set it as the boundary condition of the wind speed at the inlet section of the fully mechanized caving face; couple the EDEM software with the FLUENT software, and export the coordinate data of dust particles to obtain different particle sizes The fitting function of the dust movement trajectory can simulate the movement trajectory of dust with different particle sizes in the fully mechanized caving face; this method is simple to implement, reliable in principle, scientific in design, and accurate in data.

Description

Technical field: [0001] The invention belongs to the technical field of research on the movement track of working flour dust in the field of production, and in particular relates to a numerical simulation method for studying the movement track of dust with different particle sizes in fully mechanized caving working faces. Background technique: [0002] The comprehensive mechanized top-coal caving mining face is referred to as fully-mechanized caving face. The dust generated in the production process seriously affects the health and life safety of workers. Therefore, it is very important to take reasonable and scientific measures to reduce the dust concentration in practice, and it is clear The movement trajectory of dust is the key factor to take measures to reduce the dust concentration. However, most of the numerical simulation research on dust in the theoretical circles currently focuses on the dust migration law, but there are very few studies on the movement trajectory o...

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Problems solved by technology

[0002] The comprehensive mechanized top-coal caving mining face is referred to as fully-mechanized caving face. The dust generated in the production process seriously affects the health and life safety of workers. Therefore, it is very important to take reasonable and scientific measures to reduce the dust concentration in practice, and it is clear The trajectory of dust is the key factor for taking measures to reduce the concentration of dust. However, most of the numerical simulation research on dust in the theoretical circles currently focuses on the law of dust migration, but there are very few studies on the trajectory of dust with different particle sizes.

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