Test system for gas repeated explosion of simulated coal mine diagonal connection roadway net

Abstract

The invention relates to a test system which is used for gas repeated explosion of a simulated coal mine diagonal connection roadway net and applicable to repeated explosion study of combustible gas. The system comprises a simulated coal mine diagonal connection roadway net, two methane air premixing air pockets, a high frequency flame sensor, a high frequency pressure sensor, a high voltage discharge spark plug, a high voltage shield cable, a high voltage discharge igniter, a flame signal transmission line, a flame data acquisition device, a pressure signal transmission line, a pressure data acquisition device and a data processor. The test system provided by the invention has the advantages of simple structure, flexible combination and multiple comprehensive functions, so that a development process that secondary explosion is ignited by primary explosion of gas can be vividly represented, and change rules of air flow in a coal mine diagonal connection roadway net also can be studied.

Description

technical field [0001] The invention relates to the technical field of explosion tests of combustible gases, in particular to a test system for simulating repeated gas explosions in coal mine corner alleyways. Background technique [0002] According to statistics, since the founding of New China, there have been 24 particularly serious accidents in coal mines across the country that killed more than 100 people and killed 3,780 people. Among them, there were 21 explosions (including gas explosions, gas and coal dust explosions, and coal dust explosions) accidents, killing 3,424 people. Deaths, accidents and fatalities accounted for 87.5% and 90.58% respectively. After a gas explosion occurs in a coal mine, when the shock wave and the flame surface propagate forward along the underground roadway, the precursor shock wave can flush out the gas accumulated in the goaf or other places. If the new gas concentration reaches the explosion limit, when it lags behind the shock wave A...

AI Technical Summary

Problems solved by technology

Compared with a single explosion, repeated gas explosions often cause greater casualties and property losses

[0003] It is known from various literatures and reports that domestic and foreign experts have little research on repeated gas explosions, and most of the existing gas explosion test results are obtained from experiments carried out in spheres or straight pipes. There is even a lack of research on the repeated gas explosions in the network, and its formation mechanism and influencing factors are not very clear

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