The Research Of High-pressure Spray On Mechanized Excavation Face

Mechanized coal mine dust generated by excavation face is one of the main links. Because of its unique characteristics of the first long-distance ventilation, dust emission is not easy, just rely on their own boring machine spray dust suppression system can not achieve the desired effect of dust, how to reduce the dust concentration in fully mechanized excavation face, improve the working environment, improve safety, Coal production is one of the problems be solved.This paper analyzes the impact of dust generated by mechanized excavation face two major factors - natural conditions and production conditions. Natural conditions, including the geological structure, coal seam conditions, and given the physical properties of coal and other factors; Production conditions, including mechanical strength and production intensity, humidity, ventilation, mining methods, and cutting parameters and other factors. Established a mathematical model of dust movement, and accordingly model the dust in the still air of the settlement activities in the resistance movement and the resistance coefficient, dust in the air flow in the movement and collision sports such as dust were analyzed; Analysis of the mechanism by spraying dust effect obtained the factors affecting dust, matching the design parameters for the system provides a theoretical basis; According to two phase flow theory, Using GAMBIT build three-dimensional model of comprehensive roadway,on the comprehensive roadway dust concentration in the numerical simulation, simulate the distribution of dust,drawn from the range of about 2m Face,whether all the dust or respirable dust, its concentration is greatest, for the spray system nozzles provide a basis for rational arrangement; the same time, the wind tunnel on the dust concentration has great influence, it must be within the reasonable control of roadway wind speed, dust has reached the best results. In the above analysis on the basis of fully mechanized excavation face high-pressure spraying system is designed. Used to solve the system recoil filter water quality, research the best atomization nozzle structural parameters of the relationship between pressure and designed with the boring machine linkage control method to achieve the purpose of automatic spray.