Experimental device for simulating gas-coal dust explosion in underground roadway of coal mine

Abstract

The invention discloses an experimental device for simulating gas-coal dust explosion in an underground roadway of a coal mine, which comprises a gas dust generation system, an ignition system, a ventilation system, a pipeline system, a jet explosion suppression system and an explosion monitoring system, the pipeline system comprises an explosion pipeline and a plurality of diffusion pipelines located on the right side of the explosion pipeline and connected in series through connecting pieces, the gas dust generation system is arranged on the rear side of the explosion pipeline and connected through a gas injection pipe, the ventilation system is arranged on the left side of the explosion pipeline, and an ignition section of the ignition system directly extends into the explosion pipeline. A jet explosion suppression system is arranged on the rear sides of the diffusion pipelines, the jet explosion suppression system is connected with each diffusion pipeline through an explosion suppression pipe, and an explosion monitoring system is arranged on the pipeline system. Changes of a series of physical sign parameters generated by gas dust explosion can be observed under various conditions, the flame surface propagation rule of gas dust explosion can be objectively known, and meanwhile, effective suppression of underground coal mine gas-coal dust can be achieved.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety engineering, in particular to an experimental device for simulating gas-coal dust explosion in underground tunnels of coal mines. Background technique [0002] In recent years, domestic and foreign research institutions have carried out a number of experimental studies on gas and coal dust explosions, including: experimental research on the effect of water mist in suppressing gas explosion flame, research on the attenuation law of gas explosion shock wave overpressure at different distances, inert gas Research on the change of explosion overpressure and the law of flame action in the process of gas explosion, as well as the experimental and mechanism research on the inhibition of gas explosion propagation by porous materials. The above researches all use the gas explosion experimental device to carry out the relevant experimental research on the suppression of gas explosion, and have achi...

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Problems solved by technology

[0003] In the Chinese patent CN105548254A, an experimental device and method for simulating gas and coal dust explosions in coal mine tunnels are disclosed. The patented device also has a simulation defect for gas explosions, which is mainly reflected in the fact that the device as a whole is a closed environment and does not have a ventilation system. , it is impossible to simulate mine wind flow

In the Chinese patent CN208283323U, an experimental device for simulating gas and coal dust explosions in underground tunnels of coal mines is disclosed, but the device can only be used for explosion simulation at present, without an explosion suppression system, and cannot carry out follow-up explosion suppression experiments. The limitation is that there is no coal dust in the environment where the gas explosion occurs in this device, and it is impossible to simulate the coal dust explosion or the coupled explosion of gas and coal dust. Diffuse environment, unable to control the air flow, resulting in uncontrollable coal dust concentration in the pipeline

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