Device and method for testing coal dust explosion propagation characteristics of mine with corner joint structure

Abstract

The invention relates to a device and a method for testing coal dust explosion propagation characteristics of a mine with a corner joint structure, wherein the device comprise a coal dust spraying device, a pipe body purging device, elbow joints and bifurcated pipe joints, and the coal dust spraying device is connected with a first joint of the bifurcated pipe joint I through a pipe body; an ignition device is mounted on the pipe body between the bifurcated pipe joint I and the coal dust spraying device, a second joint and a third joint of the bifurcated pipe joint I are connected with one endof an elbow joint I and one end of an elbow joint II through pipe bodies respectively, and the other end of the elbow joint I and the other end of the elbow joint II are connected with one end of anelbow joint III and one end of an elbow joint IV through middle pipe bodies respectively; and a second joint and a third joint of a bifurcated pipe joint II are connected with the other end of the elbow joint III and the other end of the elbow joint IV, a first joint of the bifurcated pipe joint II is connected with the pipe body purging device through a pipe body, and sensor groups are arranged on the pipe body between the ignition device and the pipe body purging device and the middle pipe bodies. The device for testing coal dust explosion propagation characteristics of the mine is simple instructure, and primary explosion and secondary explosion of coal dust in parallel or corner connection space can be carried out.

Description

technical field [0001] The invention relates to the field of safety technology and engineering, in particular to a test device and a test method for the propagation characteristics of coal dust explosion in a corner joint structure mine. Background technique [0002] At present, among the domestic and foreign relevant achievements that have been retrieved, the mine coal dust explosion device mainly includes the internationally used 20L spherical coal dust explosion device, cylindrical Hartmann tube, large tubular coal dust explosive test device, and related domestic and foreign Straight-line pipeline test devices, curved pipeline test devices, bifurcated pipeline test devices, etc. independently developed by scientific research institutions. [0003] The above-mentioned devices are all used to test the propagation characteristics of coal dust explosion, but there are technical problems: the existing coal dust explosion test devices are all closed or semi-closed independent s...

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Problems solved by technology

[0003] The above-mentioned devices are all used to test the propagation characteristics of coal dust explosion, but there are technical problems: the existing coal dust explosion test devices are all closed or semi-closed independent spaces, without forming a passage structure, and in the mining process, underground The connection between the roadways is not a simple independent space, but an interpenetrating corner structure. In essence, the connection between the mine roadways belongs to the corner connection.

The reason why the research and development of coal dust explosion devices with diagonal structures is rare, on the one hand, is because the research on the propagation characteristics of coal dust explosions in linear pipeline space and 20L spherical space is the research on the propagation characteristics of coal dust explosions in the space of diagonal structure pipelines. On the other hand, because the angle connection structure is relatively more complex, it is more difficult to study the mechanism of coal dust explosion propagation characteristics in the angle connection space. Therefore, the research and development of diagonal connection structure coal dust explosion devices is rare

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