Experimental device and method for restraining gas explosion flame propagation of branch roadway by composite negative pressure cavity

Abstract

The invention relates to an experimental device and method for restraining gas explosion flame propagation of a branch roadway by a composite negative pressure cavity. An experiment system comprises an experimental branch pipeline, the compound negative pressure cavity, a methane-air premixed gas distribution device, an ignition device, a sensor and a data acquisition and measurement device; the experimental pipeline is composed of a three-way branch pipeline and three straight pipelines; the three-way branch pipeline is divided into a horizontal end and a branch end; a rupture disk is arranged at an inlet of the negative pressure cavity; and by utilizing the suction effect of a negative pressure on flame and the cooling and quenching effects of a metal wire mesh on the flame, the flame propagation is restrained. The experimental device designed by the invention is convenient for argumentation and research of the situation that the performance of restraining the gas explosion flame propagation of the branch pipeline by the negative pressure cavity can be improved by adding the metal wire mesh, is convenient for analysis and research of a relationship among the vacuum degree of a cavity body of the negative pressure cavity, the gas concentration, an angle of the branch pipeline and a gas explosion blocking effect, and provides a new idea for researching the restraining of the gas explosion flame propagation of the branch roadway.

Description

technical field [0001] The invention relates to a compound negative pressure chamber suppression bifurcation roadway gas explosion experimental device and method, which belongs to the field of gas explosion resistance and explosion isolation research and gas disaster prevention and control, and specifically relates to a composite negative pressure chamber suppression bifurcation roadway gas explosion experimental device and methods. Background technique [0002] At present, coal is the main energy source in my country, and gas explosion accidents are the most serious in the process of coal mining, with the highest accident rate. Coal gas explosion accidents will cause a large amount of property loss and seriously threaten the life safety of underground personnel. Weakening, blocking and controlling gas explosions have become the top priority for realizing safe production in coal mines. my country's coal mines mainly use traditional technical means such as rock powder sheds ...

AI Technical Summary

Problems solved by technology

my country's coal mines mainly use traditional technical means such as rock powder sheds and explosion-proof water bags to control and weaken the consequences of gas explosions, which are economical and easy to install, but the explosion suppression effect is not good, the initiative is poor, and it is prone to failure due to the high cohesion of the gas explosion flame

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