Optimization study of air cooler position and air flow parameters in coal mining face

Abstract

In order to solve the problem of high temperature and heat damage in the 10303 coal mining face of Jining No.2 Coal Mine, numerical analysis method was used to establish a physical model of the working face and to analyze the influence of multiple factors on the cooling system, such as the length of the wind pipe, the distance between the air outlet of the wind pipe and the temperature, and determine the temperature control parameters for different working conditions (production and shutdown), and then control the temperature of the air cooler air outlet through the automatic opening and closing of the temperature-control facilities, so that the required cooling capacity of the coal mining face is realized under different operations. The cooling capacity required by the working face is realized under different operations, and the problem of high-temperature heat damage in the working face is solved. The results show that the cooling effect of 100 m length of wind pipe and 50 m distance of wind pipe is the best. When the working face is under normal mining operation, the outlet temperature setting should be less than 16.5 ℃, and the average temperature of the working face will be reduced by 3.7 ℃; when the mining operation is stopped, the outlet temperature setting should be less than 20.5 ℃, and the average temperature of the working face will be reduced by 3.5 ℃, and the parameters of the two working conditions can achieve the temperature control target of the coal mining working face.

Keywords

• cooling control system
• air cooler
• cooling load
• numerical simulation
• heat hazard management