Gas dynamic disaster simulation test bench quick release device and test method

Abstract

The invention discloses a quick releasing device for a gas dynamic disaster simulator stand. The device comprises an outburst cylinder, wherein a plurality of piston barrels are connected to the outburst cylinder, and the total length of the piston barrels is identical with the thickness of a shield coal pillar; the piston barrel at the tail end is connected with a loading pressure relief barrel through a flange structure, and the end, connected with the piston barrel, of the loading pressure relief barrel is connected with an outburst barrel; a piston head is arranged in the loading pressure relief barrel in a sliding and sealing mode, the piston head is connected with a piston rod, and the piston rod stretches out of the free end of the loading pressure relief barrel and is connected with an external power device; a transparent observation window is arranged on the piston barrel connected with the loading pressure relief barrel; each piston barrel is connected with a seepage air outlet pipe. The invention further discloses a testing method adopting the device. The device can simulate coal stress, gas pressure, shield coal pillar influences and gas seepage influences, and therefore the simulation degree of a test is increased. The repeat function of conducting multiple outburst experiments by loading a coal sample once is realized, and working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of coal mine safety production, in particular to a gas dynamic disaster simulation test device. Background technique [0002] Coal and gas outburst is a very serious accident disaster in the process of coal mine production, but the mechanism of coal and gas outburst has not been determined, and it is still in the stage of hypothesis explanation. The hypotheses include the gas action hypothesis, the ground stress action hypothesis, the chemical essence action hypothesis, and the comprehensive action hypothesis, etc. Currently, there are many supporters for the hypothesis that the combined action causes coal and gas outburst. The comprehensive action hypothesis believes that during the mine production process, the mining activities lead to changes in the in-situ stress and coal seam gas pressure on the coal seam to break the original equilibrium state, and finally the combined effect of in-situ stress, gas pre...

AI Technical Summary

Problems solved by technology

That is to say, the position where the outburst occurs due to the instability and damage of the original coal body caused by various factors has a shielding coal pillar at a certain distance from the mining space of the on-site workers. The influence of the shielding coal pillar on the outburst strength cannot be ignored, but at present The prior art in this field has not considered the impact of shielding coal pillars

[0006] (3) At present, most of the equipment has a complex structure, it is troublesome to load and unload coal samples, and the experiment period is long and the efficiency is low.

None of the existing gas outburst simulators can simulate gas flow, so the degree of simulation of the test is limited

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